Quote:
Originally Posted by smokeonthewater
also understand that a compression test is to be performed on a warm engine at WOT
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Sorry Smoke, I have to disagree. How can you do a compression test at WOT? Warm engine yes, ... I totally agree, but I don't recommend trying to do a test on an engine running around 5000 rpm.
First, warm the engine up, You'll also need to disable your ignition system. You're going to need to crank the starter to turn the engine over but you don't want it to actually start. Then unscrew a plug and screw your adapter into the vacant hole, then screw in the hose leading to your gage into the adaptor. Turn the engine over a few revolutions... that's enough to get an accurate reading. Record the reading for that cylinder, then repeat on each of the other cylinders. They should all be within about 10 lbs of each other. That's all there is to it.
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1987 V20 w/1987 150HP Yamaha on a Shoreland'r Trailer
1978 16.5 Airslot w/1996 120HP Force on a Four Winns trailer
1996 V21 w/1993 200HP Mercury on a Shoreline Trailer
All towed by a 5.7L Hemi Durango.
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Last edited by Destroyer; 09-27-2012 at 09:50 PM.
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