What should compression be on a 55 HP Evinrude?

[bigbill239]

I have a 1987 Evinrude 55HP 2 cyl. Can anyone tell me what the compression should be in each cylinder

 

[steelespike]

Re: What should compression be on a 55 HP Evinrude?

rule of thumb 100 psi minimum and within 10% between cylinders.

 

[EN2]

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.

 

[EJ3]

Re: What should compression be on a 55 HP Evinrude?

77 Johnson 55hp, 135 psi on each cyl.

 

[tashasdaddy]

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.