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Old     (mnmark)      Join Date: Mar 2016       04-29-2016, 8:23 PM Reply   
Curious if any of you do this? I'll be testing the compression on a 5.7 Black Scorpion in 11 hours.

This is the only part I am wondering about, apparently this is done whenever cranking on an engine, without starting it, because:
"most marine engines use a water lift exhaust system. The Water Lift system uses exhaust pressure to push cooling water out of the water lift up and through the exhaust system. Without the engine running, there is no exhaust pressure to push the water out. The water will eventually fill up the exhaust manifold and then the engine itself. Although not fatal to the engine, it is a real hassle to correct."
http://www.moyermarine.com/forums/showthread.php?t=7396
and
http://forums.sailboatowners.com/ind...arting.113358/

Maybe it is not needed for the 30 or so cranks I need to make?

 
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