Home › Forum › Ask A Member › Johnson compression #s › Re: Johnson compression #s
April 21, 2016 at 9:08 pm
#35196
PutBack,
Spraying the cylinders will give false readings, but run it on the boat for a few hours then check it. If it idles well that is a good sign it is OK,
The two cylinders must be with in 10% of each other to have even wear. The OMC motors don’t run as high compression compaired to Mercs but they last forever using the correct oil mix & a clean fuel system. Two strokes hate dirt as the oil/gas mix carries the dirt straight into the engine.
Take your time & be careful. You will be rewarded!