July 11th, 2007, 09:43 AM
Cadet
Join Date: Jul 2007
Posts: 16
What should compression be on a 55 HP Evinrude?
I have a 1987 Evinrude 55HP 2 cyl. Can anyone tell me what the compression should be in each cylinder
July 11th, 2007, 09:46 AM
Fleet Admiral
Join Date: Apr 2002
Posts: 8,387
Re: What should compression be on a 55 HP Evinrude?
rule of thumb 100 psi minimum and within 10% between cylinders.
November 19th, 2007, 11:14 PM
Petty Officer 2nd Class
Join Date: Nov 2007
Location: Minneapolis, Minnesota
Posts: 171
Re: What should compression be on a 55 HP Evinrude?
I have a 1988 Evinrude 40 HP which is essentilialy the same engine. it carries 150psi on both cyls. Aprox. 500hrs on it.
November 20th, 2007, 12:51 AM
Petty Officer 2nd Class
Join Date: Oct 2007
Location: Tampa Bay Area, FL
Posts: 170
Re: What should compression be on a 55 HP Evinrude?
77 Johnson 55hp, 135 psi on each cyl.
November 20th, 2007, 07:22 AM
Moderator
Join Date: Nov 2005
Location: Jacksonville, Florida
Posts: 46,200
Re: What should compression be on a 55 HP Evinrude?
every compression tester is a little different, preferably over 100 and with in 10% as stated before.
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What should compression be on a 55 HP Evinrude?
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