1986 235hp Johnson

kim

Cadet
Joined
Sep 26, 2001
Messages
8
Does anyone know how much compreshion that this motor should have?
 

Dhadley

Supreme Mariner
Joined
Feb 4, 2001
Messages
16,978
Re: 1986 235hp Johnson

It depends on which heads are on it. As long as the compression is equal within 15 lbs it should be fine. Does it idle OK?<br /><br />Good luck!
 

round2it

Seaman Apprentice
Joined
Aug 27, 2001
Messages
49
Re: 1986 235hp Johnson

Don't know if ur having problems or not, but this would be a good time to check water flow around cyl. My 82, 235 ran great, but water flow around top right bank was blocked by flattened water diverters. Caused the cylinder to overheat and fragmented rings. But motor still runs, but won't do to use it. Pretty much dead in water.
 
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