What are good compression test results?

[Braxton Jordt]

Mine were 130 in each cylinder besides one which was 128. Are these good numbers??


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[1KWIKSIX]

Although they are all pretty close & no major variances, they seem a bit low to me.
Depends, was engine warmed up at full operating temperature before you tested it. Also, did you hold the throttle blade wide open during your cranking?
If you didn't do these things your readings will be skewed on the low side.

 

[Nick Micale]

My "old" compression gauge would register 150-155 on most GN's, but when I had to get a new one it would the read 120-130 on a GN?

I am thinking the China guys have trouble converting from metric.

With all your numbers the same, but one a very slight bit off, you are good there.

 

[Braxton Jordt]

Engine was cold and throttle was not opened. Thank you guys for info


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