I bought a CC100 about six months ago and have been refreshing it over the summer. Pretty much done with it now, but the engine is a puzzle. I switched it's 10 HP K241 with a good running 106 engine a month ago that runs fine in the 100. I put the problem 100 engine in the donor CC106 and finally got it running this past weekend - by jumping it from my Dodge truck. A normal size garden tractor battery - 300 to 350 CCA - will not turn the engine over. The engine "catches" on the compression stroke and acts like it has a high compression head (which it does not). Once I jumped it with the Dodge, it ran great. A bit of background on this engine: the PO rolled it into a creek (broke his pelvis in the process - that's why I ended up with it). Anyway, I bought it as a non-running project tractor. It had roll over damage to the tin, etc. that I have repaired or replaced.
My question is this - could this engine have a slightly bent crankshaft? Or some other damaged critical engine part like the piston rod, bearings, etc.? I've had the head and the oil pan off and nothing jumped out at me. It confuses me because, while very hard starting, it runs pretty good once it's going. Oh, one other thing. The PO apparently had the starting problem before his wreck because he had modified the battery area to accept a full-size car battery. Hmmm..
