365 Special Big Bore Idle Problem

[CaterpillarMT]

I have a 2003 model 356 special that I obtained with a scored piston and cylinder. I installed a Bailey's 372 Big Bore kit and resealed the carburetor. The saw will not idle after the fast idle is kicked off. I can turn the T screw in until about 3400 rpm and it runs but will not idle any slower. The L jet adjustment won't remedy this situation. I was suspecting the idle diffuser jet was plugged. Any other ideas about what to look for or how to repair this complaint? It also seems to surge for a second after you rev and let go of the throttle.

 

[Brownpot Deaton]

sounds like there's a small air leak....all i can say is make sure all bolts and seals are tight. (one time i forgot to tighten up all the bolts to hold down the cylinder...boy was that embarassing)

and i absoluetely love mine.

 

[DougNH]

it sounds as if the air leak or carb problem that caused the original piston to fry is still an issue.

 

[weimedog]

Check crank case seals.

 

[CaterpillarMT]

Ok, I'll check those things. Thanks for the suggestions. I'll follow-up with the results as soon as I get a chance.