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What is a good compression reading and What is bad

2671 Views 5 Replies 6 Participants Last post by  bgmn
What is a good compression reading?

What is a bad one?


He who loves not his country can love nothing
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They say anytime over 100psi at even pressure per cylinder around 120-135 in normal for my machine, what type of sled is it.
anything below 100 would be bad, in my opinion anyway.

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My 377 Safair has about 126 or so in both cyl's
2-stroke snowmobiles..anything less than 120 is kinda low, anything lower than 100 is real bad

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I have heard that 100 or less is considered a dead cyl.
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