1989 225 won't idle, sneeze, miss

[eve225]

The motor runs mint at all other speeds and even idles well after a run but after a while, not always, the motor begins to miss at low rpm 800 to 950 or so, it might be loading up but i am not sure how to ckeck it.

 

[rodbolt]

Re: 1989 225 won't idle, sneeze, miss

Hello<br /> if it coughs that indicates a lean mix at idle. try cleaning the carbs. check the gaskets on the side plates for air leaks. if all checks out try going 4 sizes smaller on your idle air jets.<br /> good luck and keep posting

 

[rickdb1boat]

Re: 1989 225 won't idle, sneeze, miss

Might try backing out each carb low speed screw 1/8-1/4 turn and see if that helps first. Sounds like you're close to being right, just may be a little lean on the mix. Also, make sure they are all out the equal amount of turns from lightly seated position.

 

[R.Johnson]

Re: 1989 225 won't idle, sneeze, miss

I'm not looking at the manual, but going on memory. With the air box cover off, look in .the face of the carbs. There you will see a small brass jet screwed into the top of the carb inlet. With the engine running at trouble spot, carefully stick a tooth pick in each jet, and note the difference. This should help you isolate the carb that is giving problem. Doing this richens the low speed mixture. Let us know what you find. A compression test won't hurt either.