1981 15hp wont run at full throttle

3dog

Recruit
Joined
Jul 19, 2008
Messages
4
Just bought this motor and it ran fine but noticed the fuel pump leaks so replaced it, now when go full throttle it bogs down and I have to leave the choke out to get it to do that. It will idle without the choke but sputters. I took the carb off and cleaned but i did not have a rebuild kit. It was filthy. The float is in rough shape. I can spray carb cleaner in it while it's running and it will start to accelerate. I have ordered a rebuild kit with a new float. What are other possibilites. I put the original fuel pump back on to see if the new was bad but same problem.
 

Vic.S

Rear Admiral
Joined
May 4, 2004
Messages
4,719
Re: 1981 15hp wont run at full throttle

If it runs (better) on the choke it is almost certainly still a dirty carb. Dismantle and clean all the passages and jets. (I poke a soft copper wire through jets).

If a fuel pump is not working it is easy to diagnose because you can keep it running by gently pumping the fuel bulb.

See the Engine FAQs board (First one in the repair and maintenance index) for some info on cleaning carbs and also on adjusment.
 
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