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Posting a reply to: Re: 175 HP 1998 jonhson intruder

Muskie Fishing -> Muskie Boats and Motors

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mnmusky

Posted 4/30/2016 7:18 AM (#815626 - in reply to #815625)
Subject: Re: 175 HP 1998 jonhson intruder

10% or less. Keep in mind, If it is a 6 cylinder, the center cylinder on each side may be of different (lower comp) than the outer ones. Some do this to keep the heat down and from burning down the motor. Others use thicker walls and more water flow to the middle cylinders. No clue if the one you have in mind is this way. If you do a compression test, I would think if the 4 outer ones fall within 10% difference, and the middle cylinders fall within 10% of each other, you are ok.