Compression test How-To's?

[northernmerc]

Re: Compression test How-To's?

One more point. With some two strokes, the piston comes very close to the spark plug. This may be especially true for motors that use the flat end spark plugs (surface fire plugs).

If the compression tester will penetrate the compression space further than the spark plug that you remove, check for clearances before installing the gauge. If you don't have clearance for the compression tester, use a shorter adapter or take other precautions to make sure that you don't knock a hole in the piston.

 

[Kleverrr1]

Re: Compression test How-To's?

Just a quick note on the Compression Tool, it is a loaner tool at Auto Zone no need to even by one. They loan you the thing for up to a week.

 

[paradise1819]

1992 Evinrude 40 hp.

1992 Evinrude 40 hp.

I have a 1992 40 hp. Evinrude that doesn't seem to run on the bottom of two cylinders. I can pull the bottom plug whire while rinning and nothing happens. I pull the top wire, it dies. It's is getting fire on both cylinders and both plugs. Can it be too much oil in the fuel? I have tested the trigger... the coil and the powerpack. All working order. Any leads?