compression per cylinder

albass

Petty Officer 2nd Class
Joined
Jun 30, 2004
Messages
156
What should i be getting per cylinder on a 1990 Johnson Faststrike 150 hp????
 

kynolan2183

Petty Officer 2nd Class
Joined
Mar 3, 2007
Messages
130
Re: compression per cylinder

From what I understand any thing over 100psi is good and look for them to be with in 10% of each other.
 

muskrat

Chief Petty Officer
Joined
Apr 13, 2004
Messages
445
Re: compression per cylinder

they all should be close to the same numbers as the other ones & not to very more than 15 psi..
 

albass

Petty Officer 2nd Class
Joined
Jun 30, 2004
Messages
156
Re: compression per cylinder

I'm getting from 90 to 100 on each one is that satisfactory??
 

Quimbus

Recruit
Joined
May 21, 2007
Messages
2
Re: compression per cylinder

For a 1990 - I'd say your good. As long as they are even. That's most important.. Mine was approx 90 each cylinder on a 1993 Faststrike & that is ok even though manual says 100.
 
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