1987 Johnson 120hp compression check

[fishmachine23]

I checked my compression the other day and I was wondering if anyone knew if these numbers were ok.<br /><br />The 1st cylinder was 130<br />the 2nd 130<br />the 3rd 135<br />and the 4th 145<br /><br />IF someone could let me knbow if these are ok that would be great I don't know much about boats I am new to this. But the motor won't open up or plane out and I heard from some people that all these motors do that and you need to find whats wrong just let me know thank you.

 

[93bronco]

Re: 1987 Johnson 120hp compression check

the #s are within 15psi of each other, which is good.<br />need more info type and year of boat, prop size, 20 or 25 in shaft so on.<br />what its doing or not doing at different speeds.