Compression quick Q

I'm about to test the Comression on my motor. How much pressure should be present and is there anything else I should look for? Its a 85 Evinrude 25hp.

Re: Compression quick Q

Pressure is not as important as making sure all cylinders are within a close range of each other...generally 10% or so.

I would warm it up first and then take reading. Don't worry about opening throttle. Specific directions are in the top secret file at top of forum.

G/L.

Re: Compression quick Q

big difference in rope start and electric start.