Thread: 1994 Evinrude 60HP Compression problems. What should I do??

First thing I would do is a decarbon shock treatment with SeaFoam. Sometimes, you get lucky and that low compression in one cylinder is caused by carbon on the rings not allowing them to seat good. It will cost you less than $10 and you might get lucky.

Originally Posted by Bigwill

Engine cranks and runs fine otherwise. Plenty of power on water.

Doesn't sound like there's a problem to me. Run it.

You could try decarbing, may help, may not.

Unless you're doing the work yourself, probably more cost effective to swap in a used powerhead rather than have somebody rebuild it for you, unless the damage is so minor that rings and a hone will take care of it.

You could pull the exhaust cover and look for scoring, but again, if it runs well, I wouldn't go looking for problems.

Originally Posted by DoyleAlley

First thing I would do is a decarbon shock treatment with SeaFoam. Sometimes, you get lucky and that low compression in one cylinder is caused by carbon on the rings not allowing them to seat good. It will cost you less than $10 and you might get lucky.

This is the first thing I would do those older Evinrude were notorious for carboning up the rings, they had a bad ring land design, from what happened to me as mine blew up. If the decarboning works move to a totally synthetic oil and this will help keep from building up carbon in the ring lands. Cheap 2 stroke dyno oil was what caused my problem according to my mechanic who rebuilt it using the newer style pistons.

Originally Posted by Bricks

This is the first thing I would do those older Evinrude were notorious for carboning up the rings, they had a bad ring land design, from what happened to me as mine blew up. If the decarboning works move to a totally synthetic oil and this will help keep from building up carbon in the ring lands. Cheap 2 stroke dyno oil was what caused my problem according to my mechanic who rebuilt it using the newer style pistons.

Regardless of whether you choose to run cheap dino oil or expensive synthetic - running Sea Foam (or Yamalube Ring Free, etc.) as a preventative is cheap insurance. I run Sea Foam as a preventative in every small engine I own. Use at the rate of 1oz to about 10 gallons of gas as a preventative measure.