You are a life saver I’ve spent so much money on trouble shooting this 6 months later I came across this and tried it sure enough that was it. Just wanna give a huge thanks man this fixed it thank you so much
Spent weeks trying to figure out this same issue, watched your video and pulled the fuel pump apart to find a tear down the center of the diaphragm. Thank you!
A quick check is to unbolt the fuel pump from the crank case. Once you have it away from the crank case (with the fuel lines still attached,) squeeze the primer bulb a few times. If fuel comes out of the port on the back of the fuel pump, you know the diaphram is leaking fuel into the crank case. I chased this same problem for a week.
Mine floods on the intial start up I have to open the throttle to turn it in once it turn on it’s good but if it sits and I crank I get a bunch of fuel during crank
Thank you, as one of those 50 year mechanics. I've never seen that issue before. But I got a friend whose motor will be looked at there in the next couple days.
All I can say is , I’m so happy now. I have been working on my Yamaha 1996 75hp for two weeks and ordered lots of kits for carburetors and new hoses for fuel. Rebuild carburetors and the bottom cylinder was poor gas , the water around my boat was all gas on top of water and it used almost 2 gallons of gas just trying it out. So I want to thank you and I will subscribe and watch your channel. 🤦🏻♂️🙏🏽
Thank you very much for this video, made my fault-finding much easier, and repair almost instant(tried a make-shift membrane that was not petrol-resistant, but it worked to prove your point). I only now need to replace the membrane with something more permanent(or as long a real membrane can work...). I actually tore a muscle in my shoulder trying to start my Suzuki DT-9A(1975, in mint condition), ran a few seconds on the third pull, and then nothing; me brain-dead from eating really strong antibiotics for a week due to acute blood-poisoning from stepping in a 3 inch dirty screw into my foot, feeling like a superhuman, pulled a "few" (30-40) more times, did not go well. Your video made my newly gained anxiety much more tolerable. And if i had seen your video prior to my attempts , i would not have this pain in my shoulder while breathing or trying to lay down. Thank you again for sharing this information! I think i will watch all your other videos, just in case...
i dont remember the name of the material that is used for this but i do know it can be found online, its a little pricy but a piece of it could repair the pump at least 4x.. oh, you can also recut carefully saround the holes on the old diophram and have the rip ofset to go under the sealed edges, just move the hole over, so very glad this helped you my friend and thanks for the responce, did you see my other vids on performance. i can only say i went from 26mph to 34.4 mph. i really do love these kinds of boats and motors. Have a great Summer, God Bless ya brother..
It'll start for a few seconds and then die and simultaneously with the water its flowing down side of LU out of that hole. Maybe I need to check that diaphragm. I hope that's all it is.
Thank you are a star ,I've done the same stripped the carb twice but still the same,without your video I would have wasted my money on another carb,thank you so much
im really glad the video helped you out. it took a weeks worth of trial and error to finally figure it out. It also makes me wounder about other small motors like weed eaters when they finally just stop running. i wounder if they run on the same principals of pressure changes? Im jst as glad to have gotten mine running. i prayed alot. God looks out for his own.
Thanks from the UK .Sripped carb 3 times still the same I asked a marine engineers could the fuel pump be the problem all said no ............ Busted thanks man.
Thanks for sharing common pitfalls for rest of boating community brother,were all in it together amen,they just dont make quality parts and products with pride its all a throwaway and start fresh attitude unfortunatly.but with helpers such as ur vidioe sir we can prevail!!!happy boating snooky pa.💥👍🙏💥
I have an 85 Tohatsu. It was only running on the bottom cylinder.. But both plugs were firing.. After watching your video, i started engine and unhooked the fuel line...once it started running low on fuel , both cylinders starting firing! Time to check the pump. Thanks for posting your video!!
That makes sense. i think i would do as you are, Start with the fuel pump. My next big question would be the baffles reeds. When you take off the carb, You will see the baffles, they look like flat shinny rectangles that are made of flat flexable sheets of stainless. i may also be that one or more of them are frozen shut and not allowing air fuel mixture in, maybe even damaged. they act like the valuves on a v8 engine, open and close to let mixed fuel in with each stroke but shut to create a one direction flow into the head.
Great tip 👍🏼 Another possible culprit for blooding outboards is if you have a primer solenoid they tend to leak and sometimes unplugging the tiny hose to check shows no sign but when plugged the pressure causes a leak so best thing to do is pinch tight the fuel line going to or from electric primer solenoid.
Thanks for the vid. Not sure if my Johnson 65 with 3 carbs has this unit but my lower cylinder isnt working quite right. Could be a similar issue with mine.
50HP Yamaha doing the same thing. Rough idle, floods out at 1000 rpm. Had a boat doing this before and it turned out to be a collapsing fuel line. The inner lining of the hose separated from the rubber, and the motor would suck it flat and no fuel could get through. Nearly same symptoms, except no dripping gas and no gas on the water at idle etc. I'm sure you're right.... I am going to replace pump and filter and try again. Thanks for the info!
Not a mechanic by any stretch of the imagination, realized how LUCKY I was owning several VERY OLD MOTORS and they had no issues over many years. Otherwise i'd be mosquito food on some distant marshland in coastal Louisiana long ago. Always owned Evanrudes Or Johnsons, the always seem to Get People Home as opposed to others. GREAT VIDEO, probably saved lots of folk from pulling out their Hair !
I wish I could say my johnson 65 matched your description. Mine is a nightmare that runs great untill you put it into gear then dies every time. Even when it does go it tends to bog out and peg me at a blinding 10mph. I just want to go fishing 😖
newer engines have learnt a lot from the mistakes made by the older ones. we now have a much better understanding of why motors corrode, giving us much better alloys for example.
thanks my friend, i have some other vids on performance upgrades, ill just say i went from 26mph to 34.4mph with a 40hp suzy on an 18ft boat, thanks for watching. its kind of a sleeper crabbing boat, haha. yes, i do a little un official racing, i like to see heads turn when i smoke em,lol.
*****Just an update, Its been a year from when i did this repair. Not only did it fix the problem of flooding but overall, the motor runs better than it ever did. Such a simple repair has also made a huge difference in performance.*****
@@DrDreyy911 ok, you got it Buddy. i will go through in detail of how this process if done. The vodeo should be ready in a day or 2. I will also show how i was able to test the problem even with the old pump. iwas able to make a temp repair. thanks. itll be up soon.
@@DrDreyy911 i have the video ready to upload, its done, problem is,,,,Im not able to access the upload feature on youtube. they may be having a problem, ill try again later. sorry my friend.
Man I am heading towards the Merc right now but I believe you are right, because it is definitely the number three The bottom cylinder that is flooded and I have been chasing this issue for two years
Good video I have a DT65 and a DT150 the last one us fuel injected(port injection) but the 65 hp is carb(3 of them)....the 65 boggs down when throttled and i cleaned all 3 carbs but Then i found that IT sucked false air between the carbs and the reed valves which causes a lean condition,but when you used the choke IT GOT Worse...IT sucked more false air and almost no gas so IT would just die...Im putting new gasket in behandling the carbs so håpefulle that does IT.My primer bulb gets real hard when primed so i dont think i have flooding,but i will check the fuel pump next before i drag IT out to sea😂😂
bogging down? i know it sounds crazy but there are 2 different sounds when it boggs down. one is real theouty and the other sounds to lean. I do feel its important to still check the fuel pump diophram because you said chocking motor makes it worse. if it were lean, applying a little chock should make it rev up, not down.
Gone Fishing Yes but IT drags air in between the reed and carb so when you put down the choke intstead of getting more fuel an less air(a richer mix...) IT sucks more air in between the carbs and Even less gasoline....so IT boggs down....to much air in relation to gas...
Have issues with my dt25c loosing power at launch just did a carb clean and the primer ball does not get hard plugs look saturated with fuel idk if this will solve it but I might have to start there
I have had major problems with my outboard for years… I have a Johnson 70 19 92.. When I put it up on the ramp after a weekend and get back to it I have a real bugger of a time to try to get it to start Again. This usually takes anywhere from a 1/2 hour to an hour to get the motor unflooded.. My primer's Illinois does not operate so I always have to switch it manually. I. I guess I was not sure if it was the primary soul annoyed leaking or now as I watched your video The Fuel pump. The primer bulb never holds prime. I am gonna die if it turns out to be the pump an you have shown. I have been struggling for years
Having the same por with a new 9.9 and the dealer has replaced the pump once 2 months ago and we have been out 3 times and it did it again and now it’s going back to the shop again
the gasket is going to be hard to find. i tried to buy a sheet of the diophram material and it cost more than the pump itself. you can realign the old diophram in the old pump just to confirm the issue and run the motor. thats what i did and then replaced pump.
How did your motor idle when this happened. The exact same thing happened to my Mercury 90 2 stroke (1983) Was running perfect and then all of the sudden started popping and bogging down. But it idled fine. I can tell it's running super rich when it's bogging. Mine has 6 cylinders and 3 carbs, and it sound like when I give it full throttle, I'm only running on 4 cylinders. I'm wondering if this could be my problem. A carb rebuild will cost me about $800 for all 3. I'd hate to spend all that money and still have my same problem.
Good video but first be sure your fuel hose is new and if you replaced a bad one,replace the fuel filter because it will restrict the fuel randomly.most everything is an easy fix but finding it is the time consumer
Thanks for the video. However, your 25 year mechanic needs to consider another field. That's very common, something any boat motor mechanic should know. Good move praying tho!
I have a 1992 Mercury XR6 150 hp that died on me as I was idling down the lake at about 3mph. I couldn't get it running again. It was very hard to start and was running extremely rich. As soon as I took it out of neutral it would die on me before I had a chance to put it in gear. I did notice that the fuel bulb didn't seem to get as hard as it used to but I didn't know if it was just my imagination until seeing this video and I believe I'm having the same issue as you. Once I got the boat home and tried to figure out what happened I noticed that when I opened the throttle a ton of gas gushed out of the butterfly valves of the lower carb (from a stack of 3 carbs). Gas continued flowing out of the carb until I crimped the fuel line to stop the flow. When I took the carb off, I couldn't understand upon inspection how the fuel was gushing out of the carb from behind the butterfly valves until I came across your video. This makes perfect sense if it's coming from inside the cylinder and not through the carb because as I was taking apart my lower carb and upon a visual inspection of the float and pin, everything looks extremely clean and not worn out. Can you let me know how you pressure tested the fuel pump? Did you just prime the bulb and your wife saw the seal flapping where the crack was or how was this done? I was about to buy 3 carb rebuild kits and it sounds like I would've been wasting my money. I hope I can 100% diagnose that this is the same issue I'm having. I'm not a mechanic but I tend to fix things myself whenever I can. Also, just so you know this video is marked as age restricted so you may want to fix that so we don't have to click that we want to view this adult video. Thanks for the video. I hope you get a chance to respond to this and hopefully give me a little more guidance on the fuel pump seal test before I jump into it.
Very good describing your motors issue. In hindsight. I could have checked the fuel pump by priming the fuel line bulb. if the fuel bulb does not get hard, its the diophram in the fuel pump located on the side of your motor, look for electric lines. if no electric lines, it works of crank case pressure changes, kinda amazing. you can order a new fuel pump online. i did everything you did, polished the carbs, replaced pens and seats. nothing worked until i replaced the fuel pump. i hooked mine up to water for cooling and checked each plug after repairing pump by removing spark plugs and then started the motor, careful not to run motor when you remove plugs, may get shocked very badly,lol.
if you have any questions at all, id love to help you get it running. Also mine is running great after repairing the pump. if you do have other issues after repaired, it may be the float level in the carb. it has to be setting level. then check that the valve opens freely.
Thank you so much for making that video. I think yours is the only one out there that describes the problem we both were having. I did use the bulb to see if it was leaking fuel after I unbolted it from the motor. Mine is the older motor (1992) Mercury XR6 so it works off compression from the motor, too. I clamped off the other two lines from my fuel pump and another key point you made in your video was talking about the bulb not getting hard when pumping it. I’ve been noticing this for a few times on the lake before I got stranded so there’s my fair warning that I didn’t give much thought to at the time. When I pumped the bulb it threw gas out of that hole that you talked about in your video. I went to the local boat shop and bought a rebuild kit for the fuel pump and now it works like a dream. $26.17 and I’m ready for water again. I bet I spent more than 40 hours watching and searching CZcams videos before I came across yours. It’s funny how that happened too. I fell asleep watching CZcams videos and woke up to yours playing. How weird is that? Perfect timing. I’m sooooo happy my boat is fixed again. The last time I was on the lake was sometime in September. I know it’s cold and Thanksgiving in a few days but I will be on the water fishing before the weekend. Thanks, again! Awesome information!!!
Hi, it looks the same to mine evinrude 4pk. But only happens with external fuel supply. The small tank on the engine runs the fuel, after selecting, direct to the carburator, due to gravity force. So in this case use the internal tank for trouble shooting.
that makes alot of sense. It really is amazing how on a fuel line the has to create negitive pressure to draw fuel from tanks needs to be perfect with no holes, even the smallest of pin hole can drop pressure ar add bubbles in fuel line creating vaper locks in line. thanks for the insight on this post.
@@The.Norwegian the fuel pumps not on the carb, its on the side of the motor conected by a tunnel that allows crank case gases to actuate the diophram.
I got a bad bogging problem,tryied everything except this ,,i did remove fuel pump opened it up and looked but not up close,yamaha 90hp 3 carb 3 cylinder, bottom 2 cylinders vey wet compared to the top cylinder,I have done every thing from changing all fuel lines from tank to carbs ,new plugs,new fuel filter ,compression test ,you name it I have done the most extensive process of elimination and still bog ,,so now this is the only thing let to try ,,cross your fingers
i thought about that. Problem is, i need a new computer, i made a foollow up vid that im not able to post due to outdated comp. ill be getting a new one soon so im able to post and edit, so many new vids waiting to post, thanks for the input, God Bless you brother, have fun boating, i hope the vid helped you in some way.
I have a 2.5hp merc 4 stroke that floods and boggs down. Stalls, then will not restart. Dealer replaced the carb under warranty , still stalls out. I change out the fuel pump now.
i think your doing the right thing. Its very rare the the card will flood out an outboard after its running. From everything im learning, the only thing that does that is a bad fuel pump based on crank case pressures. when it leaks, it actually sucks fuel from the pump into the crank case. I hope you let me know how it turns out for you, sounds like its a fuel pump. im glad my vid helped you.
@@gonefishing1939 I have found here in Canada parts are hard to come by for those little motors. I will have to use a fuel pump from a garden tractor and see if it makes a difference. Functions the same but is configured different. Thanks for your information and help. My outboard was about to have a boating accident before I saw your video.
@@Mascotal when you take the fuel pump apart, your going to see a black fabric, looks like its coated in rubber. thats the problem, it gets a little hole in it around the area were the motor pressure changes and makes it pump in and out. maybe you can look online for it. also, maybe amazon. im really wishing the best for you. i will help in any way i can my friend. do you have year and make of motor, if so, i can help you look for the part. should only cost about $20 or $30 us dollars
@@gonefishing1939 Thanks for your help. I have checked Amazon and the net for parts but haven't had much luck. Not to worry, I already have a couple of new lawn mower pumps on hand so I will give that a try first. To tell the truth I don't understand the need for a pump on my motor in the first place. Gravity should work just fine.
it sounds like a vaccume problem to me, did you test the primer bulb pressure? squeeze the fuel line bulb. not to hard but till firm, then squeeze it again after 30 seconds, see if it loosing pressure. let me know how it goes.
hello thanks for video but I am not good in English and didnt catch the repair procedure. Could you please describe in few sentences here in the comments for me? Thanks Ondrej
I think I might be running into this problem I replaced the water pump on my 82 25hp Johnson put it back together today it turns on and bogs out my gas line pump doesn’t the get hard
thats how i figured out my pump was bad as well. if it losses presure in the bulb. its a leak, if you dont see leak, its the pump. nothing to do with carb, i learned that the hard way. glad i could help. should only cost ya about $30
@@gonefishing1939 yeah.. i can keep bubble tight and electric pump comes on and all.. nothing leaks. Until I crank it.. it'll run about 5 seconds max and die. Water and fuel will pour out of. The hole under skeg in front of front bolt on port side of Lower.
@@JoeTayMetal hmmm? very strange... the lower unit should be sealed. have you taken off the lower unit to inspect it? my big question is , How is fuel getting into the gear box? have you found an explanation for this yet? maybe the seal around the impelor shaft is gone. also, electric fuel pump? that dosnt add up to me, check for actual wires if you have not already done this. i wouldnt assume its electric without conformation. at a glance, sounds like a really bad ripped fuel diaphram in fuel pump but only if its not electric. i hope you keep me informed, id love to help you figure this out. greatt post Buddy. the revimg could be from a sunken float in the carberater.
@@gonefishing1939 wish i could show picture of where it comes from. Doesn't come from prop area. Like an escape hole meant for this reason. I really hope manual pump is tore and it just pours in overflow and drains out that hole
Hi! I checked my fuel pump, same as yours just 10 min before this video, and I have a question 🤔 The center hole that goes in to the motor... have you seen how big it should be? I se no hole in to the crankshaft, it's just drilled and then metal without any hole. If it's not a small hole, like on the side in there somewhere.. but it's not a hole straight in to the engine..
Whys my 1998 70hp Johnson stuttering on acceleration but runs fine past that. Starts good idles good WOT good but when I put it in gear and try to go it hesitates a little
first things i would check is fire to all spark plugs, second, is the gas old or water in bottom of tank. third, id chack the baffles after the carb going into the heads. i believe you may be getting exaust gases back into the carb. just my first thoughts, let me know what you find. id love to help trouble shoot it with ya. hmmm, spark plug gaps?
Thank you sir, i made this video for one reason, to help out my fellow boaters. This fuel pump problem drove me nuts, couldnt find anything at all on this problem based on how it was running, glad to help. have you ever heard of a Numatic fuel pump on an outboard, me neither! seeing it had no wires led me to question how it worked, thats when i found the problem. runs on crank case pressure, wtf right!
You are a life saver I’ve spent so much money on trouble shooting this 6 months later I came across this and tried it sure enough that was it. Just wanna give a huge thanks man this fixed it thank you so much
Spent weeks trying to figure out this same issue, watched your video and pulled the fuel pump apart to find a tear down the center of the diaphragm. Thank you!
A quick check is to unbolt the fuel pump from the crank case. Once you have it away from the crank case (with the fuel lines still attached,) squeeze the primer bulb a few times. If fuel comes out of the port on the back of the fuel pump, you know the diaphram is leaking fuel into the crank case. I chased this same problem for a week.
does that happen after fuel starvation?
Mine floods on the intial start up I have to open the throttle to turn it in once it turn on it’s good but if it sits and I crank I get a bunch of fuel during crank
Thank you, as one of those 50 year mechanics. I've never seen that issue before. But I got a friend whose motor will be looked at there in the next couple days.
@@floridagirl9064akii
@irvineporras9631 any fix?
Thanks Steve! My old Suzuki's had me stumped for months. You nailed it.
All I can say is , I’m so happy now. I have been working on my Yamaha 1996 75hp for two weeks and ordered lots of kits for carburetors and new hoses for fuel. Rebuild carburetors and the bottom cylinder was poor gas , the water around my boat was all gas on top of water and it used almost 2 gallons of gas just trying it out. So I want to thank you and I will subscribe and watch your channel. 🤦🏻♂️🙏🏽
thank you my friend, i will be subbing your channel as well, thank you.
THAT right there is some mighty keen deductive logic. Kudos.
Thank you very much for this video, made my fault-finding much easier, and repair almost instant(tried a make-shift membrane that was not petrol-resistant, but it worked to prove your point). I only now need to replace the membrane with something more permanent(or as long a real membrane can work...).
I actually tore a muscle in my shoulder trying to start my Suzuki DT-9A(1975, in mint condition), ran a few seconds on the third pull, and then nothing; me brain-dead from eating really strong antibiotics for a week due to acute blood-poisoning from stepping in a 3 inch dirty screw into my foot, feeling like a superhuman, pulled a "few" (30-40) more times, did not go well. Your video made my newly gained anxiety much more tolerable. And if i had seen your video prior to my attempts , i would not have this pain in my shoulder while breathing or trying to lay down. Thank you again for sharing this information!
I think i will watch all your other videos, just in case...
i dont remember the name of the material that is used for this but i do know it can be found online, its a little pricy but a piece of it could repair the pump at least 4x.. oh, you can also recut carefully saround the holes on the old diophram and have the rip ofset to go under the sealed edges, just move the hole over, so very glad this helped you my friend and thanks for the responce, did you see my other vids on performance. i can only say i went from 26mph to 34.4 mph. i really do love these kinds of boats and motors. Have a great Summer, God Bless ya brother..
Best advice I have had, been having the same problem, thanks a million.
You saved so many engines lives! My hole was huge! Cheers for the heads up
Dude!! After hours and hours of frustration, 3 carb rebuilds, and tons of other headaches this was my problem the whole time.
Thank you!!!!!
That makes me feel good, I hope you have alot of fun this season. i did the same thing as you and finally i finally figured it out.
Did you notice any fuel leaking out of the lower unit
@@JoeTayMetal yes!! Fuel was coming out of the prop because it was just dumping fuel straight into the intake and couldn’t burn it fast enough.
@@primaltechbowsmadden9494 I haven't noticed mine coming from prop but it is coming out of little hole below skeg in front of front bolt on port side.
It'll start for a few seconds and then die and simultaneously with the water its flowing down side of LU out of that hole. Maybe I need to check that diaphragm. I hope that's all it is.
Thank you are a star ,I've done the same stripped the carb twice but still the same,without your video I would have wasted my money on another carb,thank you so much
im really glad the video helped you out. it took a weeks worth of trial and error to finally figure it out. It also makes me wounder about other small motors like weed eaters when they finally just stop running. i wounder if they run on the same principals of pressure changes? Im jst as glad to have gotten mine running. i prayed alot. God looks out for his own.
Awesome trouble shooting! Just bought a '98 DT40 last week for my 16 ft alum, this will come in very handy if I run into the same problem!!
Thanks
Thanks for posting, could save hours of headache.
Thanks Steve! The Lord always hears. Helped me fix my Nissan 5hp.
Thanks from the UK .Sripped carb 3 times still the same I asked a marine engineers could the fuel pump be the problem all said no ............ Busted thanks man.
i was basically told the same thing
Thanks for sharing common pitfalls for rest of boating community brother,were all in it together amen,they just dont make quality parts and products with pride its all a throwaway and start fresh attitude unfortunatly.but with helpers such as ur vidioe sir we can prevail!!!happy boating snooky pa.💥👍🙏💥
Tks for sharing chief may u have a great day ahead
Great video pal you could well have saved me a nightmare and I'm a mechanic 👍🏻
Thanks Brother, TGBTG, You can bet i prayed about it,lol.
Thanks for sharing
Your explanation is top notch
Thanks again
Thanks so much for the video probably help some people that would have never figured it out
I have the same motor and I think I've got this issue! Thanks for the info!
I have an 85 Tohatsu. It was only running on the bottom cylinder.. But both plugs were firing.. After watching your video, i started engine and unhooked the fuel line...once it started running low on fuel , both cylinders starting firing! Time to check the pump. Thanks for posting your video!!
That makes sense. i think i would do as you are, Start with the fuel pump. My next big question would be the baffles reeds. When you take off the carb, You will see the baffles, they look like flat shinny rectangles that are made of flat flexable sheets of stainless. i may also be that one or more of them are frozen shut and not allowing air fuel mixture in, maybe even damaged. they act like the valuves on a v8 engine, open and close to let mixed fuel in with each stroke but shut to create a one direction flow into the head.
I found a tiny hole in the diaphragm. Thanks again for posting your video. I was about to take this thing to the shop. The complete pump is $20.
Excellent diagnosis, well done Thanks
Great information. Thank you.
Awesome tip! Thank you!!!
Thanks for sharing this is how we educate each other.
i agree, i wish i had a vid like this when i was first figuring this problem out. thank you, i hope it helped.
Thanks a lot I have the same motor and the same problem. It only runs on one zylinder.....best regards from Berlin Germany
Any how,glad you figured it out.
Sure hope this works! Thanks for the hot tip bro!!
Wow thank you for making this video I would have never found that on my motor
Thanks for sharing..diaphram type fuel pumps generally need replacing or at minimum inspection every 100 hrs in most service manuals.
Thnx man!!! Have the same diagnosis bro.
i couldnt find anything on it, thats why i posted the vid, glad it may have helped.
Thank you..! This is great, we have the same issue.
Great tip 👍🏼 Another possible culprit for blooding outboards is if you have a primer solenoid they tend to leak and sometimes unplugging the tiny hose to check shows no sign but when plugged the pressure causes a leak so best thing to do is pinch tight the fuel line going to or from electric primer solenoid.
Glad you fixed it 🙏
Thanks, i just didnt give up and prayed about it, .
Thanks for the vid. Not sure if my Johnson 65 with 3 carbs has this unit but my lower cylinder isnt working quite right. Could be a similar issue with mine.
50HP Yamaha doing the same thing. Rough idle, floods out at 1000 rpm. Had a boat doing this before and it turned out to be a collapsing fuel line. The inner lining of the hose separated from the rubber, and the motor would suck it flat and no fuel could get through. Nearly same symptoms, except no dripping gas and no gas on the water at idle etc. I'm sure you're right.... I am going to replace pump and filter and try again. Thanks for the info!
Great to know, thanks for the great video.
Wow this help me big time thanks so much
Thank you dude this helped on my 2014 Nissan 15hp 4strk
i was woundering if the 4 strokes used a simulair system, thanks for the feedback brother
It uses something similar but it is mechanical and everyone the shaft spins it pushes valve
@@guacostacos4390 wow, i gotta check into that, did the pump still rip the diophram?
No it turns out my pump was leaking through the actual part that hit the crank shadt
Great info. Thanks
Not a mechanic by any stretch of the imagination, realized how LUCKY I was owning several VERY OLD MOTORS and they had no issues over many years. Otherwise i'd be mosquito food on some distant marshland in coastal Louisiana long ago. Always owned Evanrudes Or Johnsons, the always seem to Get People Home as opposed to others. GREAT VIDEO, probably saved lots of folk from pulling out their Hair !
I wish I could say my johnson 65 matched your description. Mine is a nightmare that runs great untill you put it into gear then dies every time. Even when it does go it tends to bog out and peg me at a blinding 10mph. I just want to go fishing 😖
newer engines have learnt a lot from the mistakes made by the older ones. we now have a much better understanding of why motors corrode, giving us much better alloys for example.
This is a great video.
thanks my friend, i have some other vids on performance upgrades, ill just say i went from 26mph to 34.4mph with a 40hp suzy on an 18ft boat, thanks for watching. its kind of a sleeper crabbing boat, haha. yes, i do a little un official racing, i like to see heads turn when i smoke em,lol.
Thanks man.
WELL DONE MATE
Thank you!
Thanks for the info......
Thanks captain!!!
Thanks for the tip
Thanks very much mate
*****Just an update, Its been a year from when i did this repair. Not only did it fix the problem of flooding but overall, the motor runs better than it ever did. Such a simple repair has also made a huge difference in performance.*****
I'd love to see a video of disembling the pump and showing exactly what it is you are talking about. I think i might have this same problem!
@@DrDreyy911 ok, you got it Buddy. i will go through in detail of how this process if done. The vodeo should be ready in a day or 2. I will also show how i was able to test the problem even with the old pump. iwas able to make a temp repair. thanks. itll be up soon.
@@gonefishing1939 Looking forward to it. Make it as detailed as possible so i can fix it myself please :)
@@DrDreyy911 i have the video ready to upload, its done, problem is,,,,Im not able to access the upload feature on youtube. they may be having a problem, ill try again later. sorry my friend.
@@gonefishing1939 If its possible i would like it emailed to me if you cant get it up on youtube :d
Thank u very much
Love the voice. I’m waiting to hear. Da Bears
I have a guestion, when the fuel pump floods the crank case, was fuel/oil coming out of the center of the prop when on the muffs?
Man I am heading towards the Merc right now but I believe you are right, because it is definitely the number three The bottom cylinder that is flooded and I have been chasing this issue for two years
Good video
I have a DT65 and a DT150 the last one us fuel injected(port injection) but the 65 hp is carb(3 of them)....the 65 boggs down when throttled and i cleaned all 3 carbs but Then i found that IT sucked false air between the carbs and the reed valves which causes a lean condition,but when you used the choke IT GOT Worse...IT sucked more false air and almost no gas so IT would just die...Im putting new gasket in behandling the carbs so håpefulle that does IT.My primer bulb gets real hard when primed so i dont think i have flooding,but i will check the fuel pump next before i drag IT out to sea😂😂
bogging down? i know it sounds crazy but there are 2 different sounds when it boggs down. one is real theouty and the other sounds to lean. I do feel its important to still check the fuel pump diophram because you said chocking motor makes it worse. if it were lean, applying a little chock should make it rev up, not down.
Gone Fishing Yes but IT drags air in between the reed and carb so when you put down the choke intstead of getting more fuel an less air(a richer mix...) IT sucks more air in between the carbs and Even less gasoline....so IT boggs down....to much air in relation to gas...
Hi mate bit late to the show had the same problem, what size prop do u have on yours just out of curiosity x
Have issues with my dt25c loosing power at launch just did a carb clean and the primer ball does not get hard plugs look saturated with fuel idk if this will solve it but I might have to start there
I have had major problems with my outboard for years… I have a Johnson 70 19 92.. When I put it up on the ramp after a weekend and get back to it I have a real bugger of a time to try to get it to start Again. This usually takes anywhere from a 1/2 hour to an hour to get the motor unflooded.. My primer's Illinois does not operate so I always have to switch it manually. I. I guess I was not sure if it was the primary soul annoyed leaking or now as I watched your video The Fuel pump. The primer bulb never holds prime. I am gonna die if it turns out to be the pump an you have shown. I have been struggling for years
Having the same por with a new 9.9 and the dealer has replaced the pump once 2 months ago and we have been out 3 times and it did it again and now it’s going back to the shop again
thank you, I have the same problem. i'm looking for the gasket replacement part. My johnson 150 v6 motor like to find Gaskit .
the gasket is going to be hard to find. i tried to buy a sheet of the diophram material and it cost more than the pump itself. you can realign the old diophram in the old pump just to confirm the issue and run the motor. thats what i did and then replaced pump.
Huge help rn
How did your motor idle when this happened. The exact same thing happened to my Mercury 90 2 stroke (1983) Was running perfect and then all of the sudden started popping and bogging down. But it idled fine. I can tell it's running super rich when it's bogging. Mine has 6 cylinders and 3 carbs, and it sound like when I give it full throttle, I'm only running on 4 cylinders. I'm wondering if this could be my problem. A carb rebuild will cost me about $800 for all 3. I'd hate to spend all that money and still have my same problem.
Had same problem last year .replace diaphram and new pump gasket set.it cured it straight away after a lot of headache working it all out.
Good video but first be sure your fuel hose is new and if you replaced a bad one,replace the fuel filter because it will restrict the fuel randomly.most everything is an easy fix but finding it is the time consumer
Amen
I have the same engine do you happen to have a part number?
I’m having idle issue with clean carb and replace new stuff, so I hope it the fuel pump it was running good weeks ago.
I have a 15hp mercury. 2 stroke. I wonder if this is my problem. It will run, cut it off, not gonna crank up.
I have the same problem, it has spark and cleaned the carbs, the diaphragm doesnt't look cracked or can't you see the crack?
the crack in the diaphragm on mine was very small. you need to add some air pressure to it and have someone watch. thats how i found mine.
Thanks for the video. However, your 25 year mechanic needs to consider another field. That's very common, something any boat motor mechanic should know. Good move praying tho!
hes an auto mech. but your right. Praying is my first step in everything, im no Dummy,lol. When ya got a Father like him, it helps out alot.
@@gonefishing1939 Amen!
did it struggle to idle? mine struggle to idle, ive change the carb to another carb that works and still won't idle
👍👍
I have a 1992 Mercury XR6 150 hp that died on me as I was idling down the lake at about 3mph. I couldn't get it running again. It was very hard to start and was running extremely rich. As soon as I took it out of neutral it would die on me before I had a chance to put it in gear. I did notice that the fuel bulb didn't seem to get as hard as it used to but I didn't know if it was just my imagination until seeing this video and I believe I'm having the same issue as you. Once I got the boat home and tried to figure out what happened I noticed that when I opened the throttle a ton of gas gushed out of the butterfly valves of the lower carb (from a stack of 3 carbs). Gas continued flowing out of the carb until I crimped the fuel line to stop the flow. When I took the carb off, I couldn't understand upon inspection how the fuel was gushing out of the carb from behind the butterfly valves until I came across your video. This makes perfect sense if it's coming from inside the cylinder and not through the carb because as I was taking apart my lower carb and upon a visual inspection of the float and pin, everything looks extremely clean and not worn out. Can you let me know how you pressure tested the fuel pump? Did you just prime the bulb and your wife saw the seal flapping where the crack was or how was this done? I was about to buy 3 carb rebuild kits and it sounds like I would've been wasting my money. I hope I can 100% diagnose that this is the same issue I'm having. I'm not a mechanic but I tend to fix things myself whenever I can. Also, just so you know this video is marked as age restricted so you may want to fix that so we don't have to click that we want to view this adult video. Thanks for the video. I hope you get a chance to respond to this and hopefully give me a little more guidance on the fuel pump seal test before I jump into it.
Very good describing your motors issue. In hindsight. I could have checked the fuel pump by priming the fuel line bulb. if the fuel bulb does not get hard, its the diophram in the fuel pump located on the side of your motor, look for electric lines. if no electric lines, it works of crank case pressure changes, kinda amazing. you can order a new fuel pump online. i did everything you did, polished the carbs, replaced pens and seats. nothing worked until i replaced the fuel pump. i hooked mine up to water for cooling and checked each plug after repairing pump by removing spark plugs and then started the motor, careful not to run motor when you remove plugs, may get shocked very badly,lol.
if you have any questions at all, id love to help you get it running. Also mine is running great after repairing the pump. if you do have other issues after repaired, it may be the float level in the carb. it has to be setting level.
then check that the valve opens freely.
Thank you so much for making that video. I think yours is the only one out there that describes the problem we both were having. I did use the bulb to see if it was leaking fuel after I unbolted it from the motor. Mine is the older motor (1992) Mercury XR6 so it works off compression from the motor, too. I clamped off the other two lines from my fuel pump and another key point you made in your video was talking about the bulb not getting hard when pumping it. I’ve been noticing this for a few times on the lake before I got stranded so there’s my fair warning that I didn’t give much thought to at the time. When I pumped the bulb it threw gas out of that hole that you talked about in your video. I went to the local boat shop and bought a rebuild kit for the fuel pump and now it works like a dream. $26.17 and I’m ready for water again. I bet I spent more than 40 hours watching and searching CZcams videos before I came across yours. It’s funny how that happened too. I fell asleep watching CZcams videos and woke up to yours playing. How weird is that? Perfect timing. I’m sooooo happy my boat is fixed again. The last time I was on the lake was sometime in September. I know it’s cold and Thanksgiving in a few days but I will be on the water fishing before the weekend. Thanks, again! Awesome information!!!
59642127540__21ACD372-B188-4D4A-A1BA-8F92B83E334D.JPG
Not sure if this pic will come through but it has a very visible hole in the seal where the fuel was going into the motor.
Hi, it looks the same to mine evinrude 4pk. But only happens with external fuel supply. The small tank on the engine runs the fuel, after selecting, direct to the carburator, due to gravity force. So in this case use the internal tank for trouble shooting.
that makes alot of sense. It really is amazing how on a fuel line the has to create negitive pressure to draw fuel from tanks needs to be perfect with no holes, even the smallest of pin hole can drop pressure ar add bubbles in fuel line creating vaper locks in line. thanks for the insight on this post.
@@The.Norwegian the fuel pumps not on the carb, its on the side of the motor conected by a tunnel that allows crank case gases to actuate the diophram.
sounds like you have a vaccume problem in your fuel line possibly.
I got a bad bogging problem,tryied everything except this ,,i did remove fuel pump opened it up and looked but not up close,yamaha 90hp 3 carb 3 cylinder, bottom 2 cylinders vey wet compared to the top cylinder,I have done every thing from changing all fuel lines from tank to carbs ,new plugs,new fuel filter ,compression test ,you name it I have done the most extensive process of elimination and still bog ,,so now this is the only thing let to try ,,cross your fingers
looks like you found the problem, you described it very well. shouldnt cost more than $50 i think. you got this brother, have fun and God Bless ya.
Good vid but u should put the name and model number of the motor in the title so people with suzuki motors can find it.
i thought about that. Problem is, i need a new computer, i made a foollow up vid that im not able to post due to outdated comp. ill be getting a new one soon so im able to post and edit, so many new vids waiting to post, thanks for the input, God Bless you brother, have fun boating, i hope the vid helped you in some way.
Wow
Was ur motor just cranking over with the key and not starting ?
my motor would crank over, took a couple turns and then it would start. OH! I did foul the plugs very quickly, could be the problem as well.
I have a 2.5hp merc 4 stroke that floods and boggs down. Stalls, then will not restart. Dealer replaced the carb under warranty , still stalls out. I change out the fuel pump now.
i think your doing the right thing. Its very rare the the card will flood out an outboard after its running. From everything im learning, the only thing that does that is a bad fuel pump based on crank case pressures. when it leaks, it actually sucks fuel from the pump into the crank case. I hope you let me know how it turns out for you, sounds like its a fuel pump. im glad my vid helped you.
@@gonefishing1939 I have found here in Canada parts are hard to come by for those little motors. I will have to use a fuel pump from a garden tractor and see if it makes a difference. Functions the same but is configured different. Thanks for your information and help. My outboard was about to have a boating accident before I saw your video.
@@Mascotal when you take the fuel pump apart, your going to see a black fabric, looks like its coated in rubber. thats the problem, it gets a little hole in it around the area were the motor pressure changes and makes it pump in and out. maybe you can look online for it. also, maybe amazon. im really wishing the best for you. i will help in any way i can my friend. do you have year and make of motor, if so, i can help you look for the part. should only cost about $20 or $30 us dollars
@@gonefishing1939 Thanks for your help. I have checked Amazon and the net for parts but haven't had much luck. Not to worry, I already have a couple of new lawn mower pumps on hand so I will give that a try first.
To tell the truth I don't understand the need for a pump on my motor in the first place. Gravity should work just fine.
I was out today heading out for a fish and scuba dive, I had the same problem
i think that iis my problem on my motor, because is not starting and gas flodding in my motor even it leaks a lot when i pump it, im goint to try it.
It stops too much for me in low speed ?
it sounds like a vaccume problem to me, did you test the primer bulb pressure? squeeze the fuel line bulb. not to hard but till firm, then squeeze it again after 30 seconds, see if it loosing pressure. let me know how it goes.
Yup, common as fleas in dog hair. I see it all the time.
THINK YOU NAILED IT COOL .
hello thanks for video but I am not good in English and didnt catch the repair procedure. Could you please describe in few sentences here in the comments for me? Thanks Ondrej
I hope to god that my problem idk what else it could be. I ordered a new fuel pump just to cover that too
I think I might be running into this problem I replaced the water pump on my 82 25hp Johnson put it back together today it turns on and bogs out my gas line pump doesn’t the get hard
thats how i figured out my pump was bad as well. if it losses presure in the bulb. its a leak, if you dont see leak, its the pump. nothing to do with carb, i learned that the hard way. glad i could help. should only cost ya about $30
Should specify only for Suzuki, 1 carb 4 stroke.
Always the cank crase... jk great info
Question.. did you notice any fuel leaking out of the lower unit
when the motor ran, fuel was coming out of the prop were its vented, also you could see and smell it when the boat was in the water.
@@gonefishing1939 yeah.. i can keep bubble tight and electric pump comes on and all.. nothing leaks. Until I crank it.. it'll run about 5 seconds max and die. Water and fuel will pour out of. The hole under skeg in front of front bolt on port side of Lower.
@@JoeTayMetal hmmm? very strange... the lower unit should be sealed. have you taken off the lower unit to inspect it? my big question is , How is fuel getting into the gear box? have you found an explanation for this yet? maybe the seal around the impelor shaft is gone. also, electric fuel pump? that dosnt add up to me, check for actual wires if you have not already done this. i wouldnt assume its electric without conformation. at a glance, sounds like a really bad ripped fuel diaphram in fuel pump but only if its not electric. i hope you keep me informed, id love to help you figure this out. greatt post Buddy. the revimg could be from a sunken float in the carberater.
@@gonefishing1939 wish i could show picture of where it comes from. Doesn't come from prop area. Like an escape hole meant for this reason. I really hope manual pump is tore and it just pours in overflow and drains out that hole
Heard it could be bad float and seat.. needle or stuck injector . I just hope isn't that bad
Prayer works
im not that smart, Always helps to keep the big man a part of everything,lol. thanks for the comment.
kill switch wire is cracked and shorts to case.
Might be same issue im having
Hi! I checked my fuel pump, same as yours just 10 min before this video, and I have a question 🤔
The center hole that goes in to the motor... have you seen how big it should be? I se no hole in to the crankshaft, it's just drilled and then metal without any hole. If it's not a small hole, like on the side in there somewhere.. but it's not a hole straight in to the engine..
Whys my 1998 70hp Johnson stuttering on acceleration but runs fine past that. Starts good idles good WOT good but when I put it in gear and try to go it hesitates a little
first things i would check is fire to all spark plugs, second, is the gas old or water in bottom of tank. third, id chack the baffles after the carb going into the heads. i believe you may be getting exaust gases back into the carb. just my first thoughts, let me know what you find. id love to help trouble shoot it with ya. hmmm, spark plug gaps?
@@gonefishing1939 thanks so much man. I did plugs last week
My motor would bog when it’s at full throttle. I think this could be an issue. I’m gunna replace the fuel pump anyways.
yep, sounds like fuel pump. as pressure increases, more fuel goes into crank case.
Good video. Anywho. Just sayin
Thank you sir, i made this video for one reason, to help out my fellow boaters. This fuel pump problem drove me nuts, couldnt find anything at all on this problem based on how it was running, glad to help. have you ever heard of a Numatic fuel pump on an outboard, me neither! seeing it had no wires led me to question how it worked, thats when i found the problem. runs on crank case pressure, wtf right!
25 year mechanic? Fuel, air, spark, mechanic. What went wrong there?
Just ordered a new fuel pump. If that’s the fix can you just marry me 🍻🍻