1994 Force Outboard 15hp

[yerevanjan]

Hello all,

I recently acquired a 94' force outboard 15hp 2 stroke, and it runs like new...2 pull start max and idles well, the only problem i have is when i lower the rpm from start speed to shift speed, i have to shift very quick because the engine idles down and dies...for some reason the motor dies when i lower the rpms to shifting speed. but when i do manage to get it into forward or reverse, which most times i do when i shift fast, it works perfectly. do you guys think the carburetor needs to be adjusted? engine carbon build up problems? or just need to take the carb out and clean it down and re-assemble? any advise would be greatly appreciated.

Thanks, happy fishing,
David

[Kevman]

Sounds like the carb needs to be cleaned. There are narrow passages inside that are best cleaned by disassembling, soaking first in carb cleaner, then blowing out with compressed air. If you are going to take it apart, you might as well rebuild the whole carb by buying a carb rebuild kit which will probably include a new float, gaskets, packing rings, a freeze plug, and possibly a needle valve and/or seat or spring. If the rebuild kit includes a freeze plug, you should definitely take out the old one and soak the carb with it open, then blow out all the passages inside the freeze plug with compressed air. Put the new freeze plug in there when you're done. Taking out the freeze plug exposes all the tiny passages in the carb that won't get cleaned out if you do a half-a*s cleaning job.

If the carb has adjustable needle valves (I'm not familiar with your exact motor), then you may need to adjust those as well. You can probably find instructions on iboats or just google for them.

Seafoaming the motor is good for making sure you don't have carbon build up. Warm up the motor first, then at slightly above idle speed, spray a ton of Seafoam into the carb until the motor almost stalls. Increase the speed slightly to prevent stalling if necessary. Repeat procedure if necessary. **BEWARE**, this procedure will create a huge dark smoke cloud and if your motor sprays exhaust anywhere, the black oily crap will be really hard to remove.

You should also check your impeller for wear (probably replace it since it will be old and hard unless it's been replaced in the last year or two), change your spark plugs and possibly wires, and change your lower unit oil.

Also be sure you're using the correct oil/fuel ratio for your motor. If you're not sure, google the correct ratio.

Good Luck,
Kev

[yerevanjan]

Sounds like the carb needs to be cleaned. There are narrow passages inside that are best cleaned by disassembling, soaking first in carb cleaner, then blowing out with compressed air. If you are going to take it apart, you might as well rebuild the whole carb by buying a carb rebuild kit which will probably include a new float, gaskets, packing rings, a freeze plug, and possibly a needle valve and/or seat or spring. If the rebuild kit includes a freeze plug, you should definitely take out the old one and soak the carb with it open, then blow out all the passages inside the freeze plug with compressed air. Put the new freeze plug in there when you're done. Taking out the freeze plug exposes all the tiny passages in the carb that won't get cleaned out if you do a half-a*s cleaning job.

If the carb has adjustable needle valves (I'm not familiar with your exact motor), then you may need to adjust those as well. You can probably find instructions on iboats or just google for them.

Seafoaming the motor is good for making sure you don't have carbon build up. Warm up the motor first, then at slightly above idle speed, spray a ton of Seafoam into the carb until the motor almost stalls. Increase the speed slightly to prevent stalling if necessary. Repeat procedure if necessary. **BEWARE**, this procedure will create a huge dark smoke cloud and if your motor sprays exhaust anywhere, the black oily crap will be really hard to remove.

You should also check your impeller for wear (probably replace it since it will be old and hard unless it's been replaced in the last year or two), change your spark plugs and possibly wires, and change your lower unit oil.

Also be sure you're using the correct oil/fuel ratio for your motor. If you're not sure, google the correct ratio.

Good Luck,
Kev

Thank you so much Kev, i really appreciate it. i changed the lower unit oil and impeller 2 weeks ago and I'll get a carb rebuilt kit and clean that out as well.

Thanks again,
David

[Hometown]

great info Kevman I am sure it could help many outboard owners

Sounds like the carb needs to be cleaned. There are narrow passages inside that are best cleaned by disassembling, soaking first in carb cleaner, then blowing out with compressed air. If you are going to take it apart, you might as well rebuild the whole carb by buying a carb rebuild kit which will probably include a new float, gaskets, packing rings, a freeze plug, and possibly a needle valve and/or seat or spring. If the rebuild kit includes a freeze plug, you should definitely take out the old one and soak the carb with it open, then blow out all the passages inside the freeze plug with compressed air. Put the new freeze plug in there when you're done. Taking out the freeze plug exposes all the tiny passages in the carb that won't get cleaned out if you do a half-a*s cleaning job.

If the carb has adjustable needle valves (I'm not familiar with your exact motor), then you may need to adjust those as well. You can probably find instructions on iboats or just google for them.

Seafoaming the motor is good for making sure you don't have carbon build up. Warm up the motor first, then at slightly above idle speed, spray a ton of Seafoam into the carb until the motor almost stalls. Increase the speed slightly to prevent stalling if necessary. Repeat procedure if necessary. **BEWARE**, this procedure will create a huge dark smoke cloud and if your motor sprays exhaust anywhere, the black oily crap will be really hard to remove.

You should also check your impeller for wear (probably replace it since it will be old and hard unless it's been replaced in the last year or two), change your spark plugs and possibly wires, and change your lower unit oil.

Also be sure you're using the correct oil/fuel ratio for your motor. If you're not sure, google the correct ratio.

Good Luck,
Kev

[yerevanjan]

Sounds like the carb needs to be cleaned. There are narrow passages inside that are best cleaned by disassembling, soaking first in carb cleaner, then blowing out with compressed air. If you are going to take it apart, you might as well rebuild the whole carb by buying a carb rebuild kit which will probably include a new float, gaskets, packing rings, a freeze plug, and possibly a needle valve and/or seat or spring. If the rebuild kit includes a freeze plug, you should definitely take out the old one and soak the carb with it open, then blow out all the passages inside the freeze plug with compressed air. Put the new freeze plug in there when you're done. Taking out the freeze plug exposes all the tiny passages in the carb that won't get cleaned out if you do a half-a*s cleaning job.

If the carb has adjustable needle valves (I'm not familiar with your exact motor), then you may need to adjust those as well. You can probably find instructions on iboats or just google for them.

Seafoaming the motor is good for making sure you don't have carbon build up. Warm up the motor first, then at slightly above idle speed, spray a ton of Seafoam into the carb until the motor almost stalls. Increase the speed slightly to prevent stalling if necessary. Repeat procedure if necessary. **BEWARE**, this procedure will create a huge dark smoke cloud and if your motor sprays exhaust anywhere, the black oily crap will be really hard to remove.

You should also check your impeller for wear (probably replace it since it will be old and hard unless it's been replaced in the last year or two), change your spark plugs and possibly wires, and change your lower unit oil.

Also be sure you're using the correct oil/fuel ratio for your motor. If you're not sure, google the correct ratio.

Good Luck,
Kev

Turns out The carburator needed to be adjusted...it was running very rich, 2 minutes with a screwdriver solved the problem, it works excellent now

[Kevman]

Good to hear. Happy Boating! Now let's see some FISH PORN!

Kev