Johnson 60 Compression Problem

[lonecow]

I was told I had compression of 125 in my top two cylinders and 95 in the lower. The motor is a 97 with very few hours. What would cause this and is there anything else I can check before the guy said I need to spend $1500 to have it fixed.

 

[JB]

Re: Johnson 60 Compression Problem

Howdy, Lonecow. Most of the things that could cause your low compression in the bottom cylinder are bad, and expensive to fix. That's the bad news.<br /><br />The good news is that there are at least a couple of possible causes that are fairly easy and inexpensive to fix.<br />Gummed/stuck ring(s)can be freed up with with a quality decarbonizing spray. Ask for it at your marine dealer and follow the directions. A blown head gasket is a bit more trouble and expense, but a lot quicker and cheaper than a powerhead overhaul.<br /><br />Good Luck.<br />JB