sc compression

Actual compression number isn't as critical as all 4 being close to ea other, within 5 or 10 lbs. They should be more then 50, I'd say around a hundred depending on the hours and usage. Obviously a rebuilt with new pistons/sleeves properly broke in will have higher numbers than a well used original with a bit of blowby and valve seepage. Do it on a warm engine. My 48 SC that's a good little wagon mover, log splitter power etc was at 80# last time I checked it. Starts and runs great.
 

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