While checking for spark on the Wisconsin engine I thought I noticed puffs of air from the carb as it was turning over. I got my compression tester and stuck it in the plug hole. While holding it in tight with my left had I reached over and thurned the key with the right. Suddenly a loud pop and the tester flew out of my hand. The recovered tester showed about 60 lbs of compression. I know this engine has a compression release built in so would this be a normal reading, low or is it even an accurate way of checking?
Compression Of an S14D
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