What should compression be?

huttoboy

Seaman Apprentice
Joined
Mar 28, 2006
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1993 TJ115TLETS Johnson 115 hp. What is average range of compression for this engine? Port side reads 100 on both and starboard side reads 110 on both.
 

JB

Honorary Moderator Emeritus
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Mar 25, 2001
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45,907
Re: What should compression be?

That's just fine, huttoboy.<br /><br />Range differs so much from guage to guage and technique to technique that we generally accept psi over 80 as long as there is no more than 15psi difference among the cylinders.
 

huttoboy

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Mar 28, 2006
Messages
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Re: What should compression be?

Thanks JB. I was concerned because I hear 125, 130 etc.
 
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