Evinrude Cylinder Unbalance

[ElwoodsDad]

I have heard alot of conversation concerning compression checking and none seem to hit my problem. I have a '94 Evinrude 120hp. My compression is 132, 115, 114 and 115. I was told that the unbalance will eventually cause problems. I dont run the engine hard, 3/4 throttle max. Can someone explain the problems caused by unbalance psi? Should I look at starting a major rebuild? Thanks! rex

 

[Craig-]

Re: Evinrude Cylinder Unbalance

That will be OK, just run it. Won't hurt a thing.

 

[Dhadley]

Re: Evinrude Cylinder Unbalance

The 132 seems a little high. Is there water in that cylinder?

 

[ElwoodsDad]

Re: Evinrude Cylinder Unbalance

132psi cylinder fires and burns fine but will warm up and check for water.

 

[ElwoodsDad]

Re: Evinrude Cylinder Unbalance

Pulled plug, no condensation on it, looks to be a clean fire

 

[Craig-]

Re: Evinrude Cylinder Unbalance

You could try a high speed shutdown, follow by immediate comp test. The 132 may bee a false reading from oil from a rich cylinder at idle.