Mercury 25XD 25HP Outboard Motor Service Overview
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- čas přidán 31. 10. 2015
- This customer's Mercury 25XD 25HP outboard motor was brought to the shop for several preventive maintenance items. The gearcase oil was replaced, the water pump impeller was changed, new spark plugs, carburetor cleaned & rebuilt, new fuel filter, and some broken plastic parts were replaced.
This model has some unique "features" that are explained in the video:
* single-action shifter and throttle on the tiller handle
* carburetor fuel primer pump integrated with the choke
* shift rod connector attachment under the power-head
The shift rod connector attachment under the powerhead is key to removing the lower unit for maintenance of the water pump and gearcase housing. - Auta a dopravní prostředky
James - nice vid. I've never seen that shifter/throttle setup before. Thanks for showing it.
Nice. same motor as the Mariner. Very glad to know about disconnecting the shift rod !
I have the same motor and I had a hard time to get lower unit off.
This video helped a lot.
thank you.
Sir, may I ask you how did you remove that little plastic part with the pin that holds the shifting rod? I have removed that little screw completely as indicated in this vid, tried with a flat screwdriver but apart from coming a bit loose, did not remove completely. I would very much appreciate any help on this!
once the screws out, pull it straight to the right. There's a pin on it that goes thru the shift rod. You may have to try turning the throttle back and forth to make it come out easier.
Put your engine into forward to drop the lower unit
First video I've seen with my same motor I just picked up from a friend
I have the same motor but mine is an 87. I've been slowly restoring it and I seen on the choke yours has an arm on it. I think that's one major reason my motor is being a pain in the ass. Lol. Gotta love 2 stroke motors
Hi, Thanks for the video! Glad to finally find a video that works with my 1987 25XD ELH 2 stroke motor. I may have other questions on this type motor if that's ok. I wondered if you had any trouble getting the top of the shift shaft to line up thorough that "s-hook" looking like part of the linkage when you reinstalled the lower unit? Do you have any videos of replacing the prop shaft seals in bearing carrier and or seals on top of the lower unit when you installed water pump impeller? I have a full seal kit for the lower unit seals. Thanks!
Change that gray fuel line to automotive line. It will run a lot smoother and more power.the liner inside that gray line breaks down after a season or two and ends up in your carb
Great video! I just bought a little boat with this motor on it. It's starts right up and idles just fine. I have a fast idle lever on my remote and it will rev great! But full throttle in gear and it doesn't do much at all. Sounds like a simple linkage issue? What link do I adjust?
Hey man great video I have a 25 horsepower Yamaha I went to replace the control and throttle cable one went on fine I think I moved the throttle forward and now I can't get it to go back any idea what I could have done or what I can do to fix that any help would be appreciated
Looks like my 1985 model with that style decals
I had a similar era Mercury 9.9, power head was made by Yamaha. Looks like that one might also be a Yamaha.
My 9.9 was an amazing motor while I owned it.
good video, I have an engine like this one, it has normal idle but when I accelerate the top piston does not work, it goes back to idle, both work,
I changed the load coil cdi.
Another day at full throttle the engine coughed and both pistons worked, then it didn't work anymore.
do you have any tips that can be
I have same outboard motor wanted to see if you could help me with getting the tiller
I have a 85 20hp just broke the same shift system trying to find the shift Linkage plastic ball clips where can I find them I’m having issues here in the Boston area
What connector is needed from hose to engine? Standard mercury? The connector looks round in the video.
I see a metal rod running from the top of the carb from a black plastic lever to somewhere underneath the flying wheel (hope that’s correct English). I have recently bought the exact same engine and mine doesn’t have that metal rod. I do have that black lever which seems connected to the choke. Do you know it’s function? Mine’s on remote btw.
Are parts for the 25hp xd still readily available looking to buy a used motor
How do you adjust the rods?
Hey I need to know about the fuel pump gaskets and which ones to use. Can you send me something to let me know. I have this exact motor and have fuel coming out between the gaskets. Pretty sure I have used too many but don’t know which to use. Thanks
How do you replace grease lines????
So , I came here to see if there was a remote that can work with this for my pontoon boat. steering throttle and shifting. I am guessing NO right?
That was my first 25 mercury I ever bought, they are one best 25 merc mainer outbords ever made, I got one of last USA models 20 /25 mercury mairner, 2stroke outbords, I will never part with it, it's never let me down
Wondering can the engine not be pulled over with it in gear?
Boa noite voce nao tem ai disponivel o afogador desse motor 18xd mercury ou o 25xd disponível para venda entregar Brasil preciso dessa peça nao acho aqui no Brasil obrigado
Do you know the exact year on this?
Hey that was a great video, I need a choke knob just like the one you have on your. I have an 84 merc 20hp, do u have any idea where I can get one, i have scoured the internet and cant find it!!! Thanks for any help you can provide
no longer available i'm afraid. but there is one on ebay for $17.99. ACTUATOR, PRIMER
110241 , or are you talking about the complete assembly?
@@ct1762 we found a primer on Ebay and fixed it, thanks a bunch!!
I have the 1980 merc 25 hp but it has the tillotson BC1B carb on it and apparently nobody has parts for that carb. You have any ideas on where I can find one ??
boats.net has them , but the kit is gaskets only. other parts like bowl and needles you need to order separately.
FYI everyone I have this motor in 18hp and the NGK plugs I have in mine are BP8H -N 10
the 25xd takes NGK BUHW surface-gap (aka gapless) plugs!
Looks a lot like my 94. I'm dealing with a stalling at idle and again at WOT. Any ideas? This is my first boat. I do know the primer bulb won't really get very hard and after 3-4 pumps it will start to leak at the plastic connector on the end of the hose that connects to the motor. This piece has a crack in it also. Heard it could be either one of the kill switches or carb needs cleaned/rebuilt. This thing has ran strong for the whole summer till last trip out she left us stranded in the middle of the lake. We were running a pretty good clip and then she died. Took a while to get it to start back up. Plugs are clean as a whistle and has good spark.
I suspect the leak you observe at the primer bulb after three or four pumps is the problem. Air is likely being pulled into your fuel system when the engine is running and that eventually prevents fuel from being drawn through to the carburetor. the engine stalls from lack of fuel. get a new fuel hose/primer and try that.
Bobg Gallagher change gas line and clean carb. I changed mine to automotive gas line. Wow the difference smoother and more power
Thanks, Keith!! I will be getting it out of the pole barn soon as the weather stays above freezing. I will also change out the plugs. What do you recommend, Champion or these NGK's I have heard people talk about? I also thought about putting an in-line filter in the mix also. A friend told me to ditch the fuel that has been in the can since the fall. Said it goes bad after time.
Also, my line has the same connection this motor has on the can and there is the Mercury quick disconnect on the motor side. That quick disconnect has a crack in it. I thought the leak was the o-rings but found it came from the crack. New line, clean carb, and plugs should have it going good like it did at the begging of last fishing season. I was pretty impressed on how this 25 pushed my boat. Always wondered how much better a 40 would push it. That's the max hp on the coast guard tag.
Bobg Gallagher
The first o
I just picked up a 1980 mercury 25 hp that had a steering console , and was wanting to convert it to a tiller handle, would you know where I can get a complete kit?
Most of them are tiller so you should be able to find someone who would swap
I have a question for you: I have a 25 xd and the choke knob has failed. There is a little plastic keeper that prevents it from being pulled off, and that little sucker has broken off. Where could I go to get a replacement?....TIM
boats.net has them or try ebay
Mine is completely missing the choke I just use the primer to start it
Got the same motor. Can’t get it to pee. Water pump is fine.
Do you know if it’s the same for the 18hp XD? Please let me know
Yes, exactly
Thanks for the video! I have the same motor. How do I get the gear box out the change the oil seals? I have the prop off and am stuck on how to proceed.
Remove the bolts mounting lower unit, unhook shifter linkage at top like he showed and pull off
never try to do anything on an outboard you aren't familiar with without the FACTORY service manual. the seals might need that special merc tool, but look in the service manual (obviously dont get the owners manual lol)
I own a 25 hp Mercury XD electric start that has a problem with the reverse lockout mechanism. When the throttle is pushed forward the shaft doesn't unlock. Can you give me a diagram or source to understand the entire mechanism so I can troubleshoot it?
Did you ever figure this out? I can see that the lockout rod is not connected on mine. But I don't know what's supposed to keep it attached to the shift shaft. A spring underneath the bent tip perhaps?
At 2:01 when you say that rod adjusts the idle, it does not. Once that throttle rod is set it should not be touched it links the carb and spark together to keep everything in time..The funny looking screw with no head right above the rod is the idle adjustment screw
putsstuff
I have the same motor remote start. Engine start up excellent but will only run in full choke. As soon as I put it to half choke or run it Bogs down & dies. Can’t figure out how to fix it. Any ideas?
Carb has been cleaned many times. Running 50:1 fuel/ oil ratio.
@@michaelperkins3919 starving for fuel. Try getting a full diphram Nd gasket kit from mercury Nd replacing everything.
Why is it running so ruff at idle ?
I need a carb kit for this exact motor. Where is best place to buy?
Benjamin Gabbard thank you!
Please where can I get a complete hand control knob for the same engine Can you point me to a place to sell these things?
How can I get in touch with this guy? I need help with the engine just like this. Please. Iam from Europe and we cant get any parts for this kind of engine.
Www.Boats.net is where I order all of my outboard parts from. They have a great site with diagrams.
I have this same engine I can get it to crank but not fire and stay running.
Does anyone know how to remove the stop button on the end of the tiller? Doe the handle come off or do you pry the button out which I doubt?
What did you find out?
@@thefixer2954 Nothing so far
Hey my buddy has a 86 mercury 25 Xd stick steer it won’t start up unless you spray starter fluid in carb and won’t idle in low speed or shuts off any tips you can give me?
I'm having the same problem....did you get anywhere with that?
Clean your carb
how do I remove that clear yellow fuel filter? I want to pour out the old gas that is in it? and clean the screen and put it back in?
Tiamu 2011 it pulls out its a ball and socket then its easy to unscrew
It screws into the housing
Do you know the weight of this outboard ?proximately?
108 lbs
I have a 1980, 25HP Mercury as well. Any idea how much a motor like this would be worth these days?
B Cain 800$-1700$ depending on condition
@@thisguy4426 thats high... a nice running 18/25 with full service (short shaft of course) will get $600-$800. i see lots of guys asking ridiculous prices in the spring. makes me chuckle.
Bluebook is $550
Just tried to get it start it. Before I put it on the lake and noticed its not peeing water. Any ideas
Probably needs an impeller kit.
Check the water outlet line where it's supposed to pee out....mine was clogged by some bug that had crawled in there and died.
Does anybody know why my 25hp mercury starts in forward or reverse. It's hard to find neutral I have to keep turning handle until I find neutral to start it correctly. Thanks
It should be pretty obvious, unless there is something wrong with cam system or in the lower.
@@ramboassgoblin could you give a better answer?
Any idea where can i get handle for a motor exactly like that one?
Try boats.net search for part number 99589 if you're looking for just the grip part.
Thank you , really appreciated your help.
@@highlandoutboards what spark plugs go in it?
CmJ. NGK BP8H-N 10
What sparkplugs work with this engine?
NGK BUHW
You didn't show any repair procedures.
I have the same exact motor and it’s idling rough. What can I do to find the issue?
I have a 1984 20hp mercury that's very similar to this one. When I first got it, it would die if I tried to idle and was hard to start. My issue was that the mixture screw on the carb was set way too lean. Also, my throttle rod was out of adjustment. It was running like 300rpm in forward gear idle and was supposed to be 700-800rpm.
@@wero905 mines doesn’t shut off but it feels like it’s about to, it shakes and gives off crazy vibration. Haven’t messed with the mixture screw or throttle rod as I’m not familiar with motors.
Heres a link to the site I use for parts. www.marineengine.com/parts/mercury_marine_parts/sn/0b187996 . Also, I paid for a 1 yr subscription to Clymer.com to obtain access to their version of the service manual for these models. It's been helpful, but the manual is sort of hard to navigate. My motor is the first outboard I've ever had. Its been a fun learning experience, but kinda sucks when you can't find anyone to help you. If you get that manual and go through the tune-up steps it should help you diagnose your issue.
I'm no boat mechanic so I may not have the perfect diagnostic flow chart, but I would verify you have fresh, clean gas properly mixed with 2 cycle oil, verify your fuel filter is clean or just replace it because it probably needs one anyway, verify you plugs are sparking maybe even go ahead and change your spark plugs and wires, verify your motor has compression by renting a compression tester from your local auto parts store, make sure your carb is set properly. Thats all pretty safe, easy stuff to check. Just search for some videos on those topics. That clymer manual has instructions on how to do all of that.
I hook battery cables up backwards now won't start
Does anyone know the correct fuel mixture for these 2 strokes? 1:50 seems to be smoking quite a bit. Should it be 1:100 or 1:50?
50 to 1 according to mer c service manual
lol your a bit late but ty for the answer.@@thomasirvin4159
Or do you have any 20 to 40 hp outboard for sell
i have a few in RI
whay ngk plug does it take?
Ralph Kluge my 18hp looks exactly the same and it uses NGK BP8H-N 10 I know as I’m changing mine out today.
@@BettinHuge super timing
Was just in the store when your message came thru.
@@ralph9987 NO! This one takes NGK BUHW don't use bp8h! those have extended tip and will smash the pistons!
I was wondering if anybody could tell me what the difference between a 25 horse Mercury XD and another 25 horse Mercury that is not an XD do anybody know what the difference is
Have you found out what the difference is? I have a 1981 25 non XD.
It means extra duty
Longer vanes on the impeller and stainless steel water pump. Xtra durable.
84 and 85 were the only years they made the XD in 18 and 25hp. And the parts are identical as far as I can tell.