hey bud, i got a question i have the same year engine but it's a 15hp 4stroke..it starts, idle's good for 10secs then get rough idle and shuts off, i pump primer bulb a few times. and it will restart right up...and do the samething. sometimes it will let me rev it up and sometimes it won't, vary boggie. any suggestion on what it could be?
My vote is plugged or restricted exhaust. It has all the symptoms. Won't idle or make power. Even with a completely plugged exhaust a engine will still test with good compression. Technicality you could remove the exhaust valve rockers and a engine will still have good compression.
Good to know they don’t have crank and main bearings. I’ve got one that has a wicked knock and I just found a doner I’m looking to pick up. These engines don’t like to start but they are incredible on gas.
The tops of the pistons have carbon build up all the way around so that tells me you don’t have ring wash. You know if you have bad rings when the edge of the pistons are clean from the oil getting into the combustion chamber and cleaning off the edge of the piston.
I have no idea what’s wrong! But then again I can barely run a hammer. Lol. But I love these videos I’ve already learned a lot. The only thing is how do you keep up with all those little parts. For me it just like looks I would never remember where they. But anyway keep these coming. I love watching you and the strip down of a motor and put it back together!
After watching the whole video my only guess is something with the valves. And it's the only thing he didn't talk about/show him checking. I think I've owned more 2 strokes than 4 strokes, but I can distinctly remember adjusting valves often on all my 4 strokes. XR650R made it easy, hardest might have been on my Ninja 250, but they all needed it eventually. When I am diagnosing a 4 stroke valves are always on my mind now.
@@mjodr I would bet that in the service info on those motors, it recommends check valve lash at x amount of run hours,, all of them likely need adjusting and would start 1st pull when warm..
If there same engine as yamaha then I think you can take the airbox off then get a long 1/4 socket extension and go in behind the carb from the tiller end
The top carbuetor gasket looks wrong I just did this last night kit came with 3 gasket all of them where wrong and quite different I reused the old gasket it was still in good shape.
Would you be interested in installing a tilt/trim motor on my 96 40HP Jonson motor. It currently has the tilt assist mechanism. I’m located up in norther AZ. Keep up the awesome videos!!
Did you check the valve adjustment and do a leak down test to make sure you don’t have a leaking valve ? Another thing is a smoke test to see if you have a vacuum leak.
yes I want to get into flipping outboards too, but Texas is hard to do it in.,., they want damned titles for everything,, you cant even use a boat with just an electric trolling mot without registration.., for the older small outboards, they change hands so many times its hard to find original owners or paperwork, and nobody wants to buy a motor without a title, only maybe for parts.. it sucks.
I figure this... put another carb on it that you know works... one of the first things I do is swap carbs... even an eBay cheapee to see what shakes out.
I have a 84 johnson 9.9 i revived using your vids and my mechanic skills. Runs great now. Only thing is after i ran it and put it in the garage a few days later i noticed thick black goopy about 3 inch diameter puddle coming from prop area. The oil is perfect and it was also perfect when i got it but i put in new anyway. Still oil looks new and hasnt seemed to go down. Could you give me some direction? Is it just old build up. Or should i pull the prop and get new o rings or the whole carrier? Theres no play anywhere not even a scratch on the bottom fin. It came with the original OMC card and receipts. He kept it top notch. It was basically a good carb clean. Any HELP be much appreciated as im a loyal watcher and commenter and like your vids and your work.
Hi Brandon this is Peter from Finland and I have an evinrude 15 hp but it is the same as your engine. The problem is that it pulls the starter rope out of my hand when I want to start and the ignition is too early. Have researched everything several times to no avail. I have read that the ignition module must have automatic setting. That at 0 rpm the ignition should be 5 * atd and at 1000 rpm 10 * btd but it is constantly 30 * btd checked with a stroboscope lamp. Haven't figured out what's wrong and have given up on that engine. It was my first 4 soke engine but maybe the last. Very disappointed that it could not be repaired.
Its the ignition module mine would do the same thing jerk back on me about ripping my arm off of the socket occasionally then it just stop firing new module took care of it this is the 2nd one I've put on the last one lasted 12yrs
Brandon, I just bought a 1996 16' MonArk bass boat, it will handle up to 60hp. Do you have a recommendation for a decent motor, I don't need 60 hp, but more than the 9.9hp merc that came with it.
@@Newbgainer I've had nothing but two stroke, ranging from 1956- fd10 15hp Johnson, 1956-5.9hp mercury dad bought brand new, and a 1960-10hp Johnson, what do you think of 4strokes?
@waynewolfe8817 they are a little more fuel efficient, but I still run 2 cycles cause there's nothing like the smell of a great running motor at 5am with a little smoke rolling 😀
Once the carb bowl is full, it should still be able to idle and run until it's out of gas; and the hose bulb works as a manual fuel pump. So not the fuel pump.
CHARYJOD link: bit.ly/42gJxfv
Carb tool: officialyoutubemerch.com/
hey bud, i got a question i have the same year engine but it's a 15hp 4stroke..it starts, idle's good for 10secs then get rough idle and shuts off, i pump primer bulb a few times. and it will restart right up...and do the samething. sometimes it will let me rev it up and sometimes it won't, vary boggie. any suggestion on what it could be?
My vote is plugged or restricted exhaust. It has all the symptoms. Won't idle or make power. Even with a completely plugged exhaust a engine will still test with good compression. Technicality you could remove the exhaust valve rockers and a engine will still have good compression.
One of the piston tops looks washed. That tells me the rings are bad on that piston. That's all I saw. Great stuff....thanks for sharing
9.9 4 stroke - the right size and so many people are not interested in mixing gas and oil. I know it’s easy, but it’s just another thing to remember.
what was the paint you used , i have the same color motor ?
They are likely so quick to sell as they're popular as trolling motors on fishing boats. Or backup kickers etc on big water
Good to know they don’t have crank and main bearings. I’ve got one that has a wicked knock and I just found a doner I’m looking to pick up. These engines don’t like to start but they are incredible on gas.
The tops of the pistons have carbon build up all the way around so that tells me you don’t have ring wash. You know if you have bad rings when the edge of the pistons are clean from the oil getting into the combustion chamber and cleaning off the edge of the piston.
1979 The Evinrude factory instructor when I attended their school in Atlanta said never to use the word "stroke." 2 cycle or 4 cycle
Yeah, that's not wrong.
I have no idea what’s wrong! But then again I can barely run a hammer. Lol. But I love these videos I’ve already learned a lot. The only thing is how do you keep up with all those little parts. For me it just like looks I would never remember where they. But anyway keep these coming. I love watching you and the strip down of a motor and put it back together!
Check Valve Lash tight valves will limit the draw on carb
After watching the whole video my only guess is something with the valves. And it's the only thing he didn't talk about/show him checking. I think I've owned more 2 strokes than 4 strokes, but I can distinctly remember adjusting valves often on all my 4 strokes. XR650R made it easy, hardest might have been on my Ninja 250, but they all needed it eventually. When I am diagnosing a 4 stroke valves are always on my mind now.
@@mjodr I would bet that in the service info on those motors, it recommends check valve lash at x amount of run hours,, all of them likely need adjusting and would start 1st pull when warm..
At 75yo. I'll stick to 2 strokes!!
If there same engine as yamaha then I think you can take the airbox off then get a long 1/4 socket extension and go in behind the carb from the tiller end
The top carbuetor gasket looks wrong I just did this last night kit came with 3 gasket all of them where wrong and quite different I reused the old gasket it was still in good shape.
Would you be interested in installing a tilt/trim motor on my 96 40HP Jonson motor. It currently has the tilt assist mechanism. I’m located up in norther AZ. Keep up the awesome videos!!
What city? Northern AZ is a huge place.
Flagstaff, willing to commute either way let me know. Is this the best way to get ahold of you? Thanks!
Did you check the valve adjustment and do a leak down test to make sure you don’t have a leaking valve ? Another thing is a smoke test to see if you have a vacuum leak.
No, my leak down tester doesn't fit into the spark plug cavity. But I too was suspecting valves.
Could you do a video of. A 1978 35hp evinrude 35853R setti g the throttle wh3. Cold and warm please?
at least here in florida anything less than 10hp does not require a boating license. 9.9 cowls and sticker kits also go for big money :)
yes I want to get into flipping outboards too, but Texas is hard to do it in.,., they want damned titles for everything,, you cant even use a boat with just an electric trolling mot without registration.., for the older small outboards, they change hands so many times its hard to find original owners or paperwork, and nobody wants to buy a motor without a title, only maybe for parts.. it sucks.
Why didn’t you drop the intake? Oring seals on the intake. Much easier to get to the carb nut.
Did they design the pistons to move that way together? That's just odd....
I figure this... put another carb on it that you know works... one of the first things I do is swap carbs... even an eBay cheapee to see what shakes out.
I CAN SEE IT. Probably that gaskets
I have a 84 johnson 9.9 i revived using your vids and my mechanic skills. Runs great now. Only thing is after i ran it and put it in the garage a few days later i noticed thick black goopy about 3 inch diameter puddle coming from prop area. The oil is perfect and it was also perfect when i got it but i put in new anyway. Still oil looks new and hasnt seemed to go down. Could you give me some direction? Is it just old build up. Or should i pull the prop and get new o rings or the whole carrier? Theres no play anywhere not even a scratch on the bottom fin. It came with the original OMC card and receipts. He kept it top notch. It was basically a good carb clean. Any HELP be much appreciated as im a loyal watcher and commenter and like your vids and your work.
The pisser was also stuck but your wire trick worked instantly. Thx for that😊
Hi Brandon this is Peter from Finland and I have an evinrude 15 hp but it is the same as your engine.
The problem is that it pulls the starter rope out of my hand when I want to start and the ignition is too early.
Have researched everything several times to no avail. I have read that the ignition module must have automatic setting. That at 0 rpm the ignition should be 5 * atd and at 1000 rpm 10 * btd but it is constantly 30 * btd checked with a stroboscope lamp. Haven't figured out what's wrong and have given up on that engine. It was my first 4 soke engine but maybe the last. Very disappointed that it could not be repaired.
Its the ignition module mine would do the same thing jerk back on me about ripping my arm off of the socket occasionally then it just stop firing new module took care of it this is the 2nd one I've put on the last one lasted 12yrs
@@robertpurchase8262 Thank you Robert !🤗👌
😊😊😊😊😊😊😊😊
Brandon, I just bought a 1996 16' MonArk bass boat, it will handle up to 60hp. Do you have a recommendation for a decent motor, I don't need 60 hp, but more than the 9.9hp merc that came with it.
No less than 35hp imo
@@Newbgainer I've had nothing but two stroke, ranging from 1956- fd10 15hp Johnson, 1956-5.9hp mercury dad bought brand new, and a 1960-10hp Johnson, what do you think of 4strokes?
@waynewolfe8817 they are a little more fuel efficient, but I still run 2 cycles cause there's nothing like the smell of a great running motor at 5am with a little smoke rolling 😀
1st like and comment 🎉
Why is it a special wrench? Thin? Straight?
How can I get a gas pump for one
شكر
2 strokes are making a comeback anyway. Ppl cant mix gas anymore. Such a hassle. Lol
You’ll never see 50-70 y/o 4-strokes. Their longevity is maintenance dependent.
Does anyone know if this was a OMC/BRP design or a contracted out engine and if so, ro whom ? Regards.
I'm fairly sure that all of the 4 stroke OMC outboards were rebadged Suzuki
@@mgarner79not this era, that is OMC manufactured.
Be careful with that carburetor because it’s expensive.
Fuel pump?
Once the carb bowl is full, it should still be able to idle and run until it's out of gas; and the hose bulb works as a manual fuel pump. So not the fuel pump.
Don’t you love plastic carburetor
Not
I enjoy your videos
Plastic parts for carbs