Hello all. Just spent a frustrating afternoon and don’t understand what’s wrong. This motor is new to me and I spent the winter bringing it back to life. As of February I had it running like a top and waiting for ice off to make final adjustments.
Finally got it out last week it ran like a dog. Would not get up to speed and seemed like there was just no power. Aso would not idle. I kind of thought the fuel pump might be week. Today at the shop I:
- Pulled the carb. and re-cleaned it. Installed kit in Jan.
- Checked for spark and was present on both cylinders
- Did spark quality check and get nice blue snappy spark jumping 3/8 in.
- Checked comp. 92 on top and 95 on bottom.
- Cleaned all ignition coil terminals.
- Used fresh gas mix.
Well I could get it to rev. but not idle. Finally I pulled the plug wires one at a time and found the bottom cylinder was not firing even though I have excellent spark to the plug. I put a new plug in and same deal. When I pulled the new plug it was wet but also had a light gray oily build up around the insulator. I’m thinking the head gasket may be leaking water and fouling the plug but I’m not sure and though I would ask for advice on where to go from here. If the head gasket is the problem wouldn’t my compression be much lower on the leaky cylinder? As always, thanks for any help and/or suggestions. Rick.