cold compression test?

[gain11]

what exactly is a cold compression test? 74 merc 65.

 

[andrewkafp]

Re: cold compression test?

My best guess would be that if the motor won't run, but will crank or can be cranked with a cord, you can hook up the tester to each plug hole and get a reading from each to ascertain any differences between them. Normally, you do it after the motor has warmed up either while running or by using the starter with plugs removed.

 

[Hooty]

Re: cold compression test?

Checking the compression when the engine is cold. Usually it's okay to do a compression test cold because all you're doing is comparing one cylinder's pressure reading to the other(s).<br /><br />c/6<br />Hooty