Compression

rudedude

Petty Officer 1st Class
Joined
Aug 20, 2007
Messages
293
Could anyone tell me what the compression should be on an Evenrude 70hp 1978. Thanks.
 

_brad_

Petty Officer 2nd Class
Joined
Jun 28, 2007
Messages
173
Re: Compression

100+ psi and within 15 psi between all cylinders.
 

tashasdaddy

Honorary Moderator Emeritus
Joined
Nov 11, 2005
Messages
51,019
Re: Compression

within 10% of each other. the main things is they are relatively even, as guages are different.
 

rudedude

Petty Officer 1st Class
Joined
Aug 20, 2007
Messages
293
Re: Compression

Thanks, I have 120 in all three so I guess I'am good there. This one is a fine running motor. my first evenrude was a 50 hp ,I had two of them and went to a running 70hp for 400.00 bucks. I just got a 14 foot boat and trailer and it came with a 70 hp. 500.00 bucks. I 'am selling the lower unit complete with the stainless prop and shift rod on e-bay. There is nothing wrong with the unit
I'am just putting a jet pump on this new motor as I did with all three of the other ones. Thanks again for your help.
 
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