Is high 80 s good compression for a 85hp evinrude?
B boatin12 Seaman Apprentice Joined Jun 11, 2008 Messages 42 Apr 2, 2011 #1 Is high 80 s good compression for a 85hp evinrude?
JB Honorary Moderator Emeritus Joined Mar 25, 2001 Messages 45,907 Apr 2, 2011 #2 Re: compression What matters is the spread, boatin. Psi is too dependent on technique, conditions and guage. If all 4 are 80psi I would say that is fine. Go to the Top Secret File ^^^ and check out the article on compression testing.
Re: compression What matters is the spread, boatin. Psi is too dependent on technique, conditions and guage. If all 4 are 80psi I would say that is fine. Go to the Top Secret File ^^^ and check out the article on compression testing.
E emdsapmgr Supreme Mariner Joined Dec 9, 2005 Messages 11,551 Apr 3, 2011 #3 Re: compression My 1979 evinrude 85 has 124 on all 4 cyls after a stock overhaul. That's a normal (factory) range for that engine.
Re: compression My 1979 evinrude 85 has 124 on all 4 cyls after a stock overhaul. That's a normal (factory) range for that engine.
