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How do you flush your Mercury big blocks?

Old 04-11-2011, 01:48 PM
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Join Date: Sep 2010
Location: Manasquan, NJ
My Boats: 2002 Formula 370 SS, 1986 Formula 242 LS(sold), 2010 Grady-White Sportsman 180 ( for sale)
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Default How do you flush your Mercury big blocks?

Mine are partially closed cooling but the manifolds and risers still have salt water cooling. I'm new to I/O's. My yamaha outboard was simple, I just hooked up a hose and turned on for 4 or 5 min. What do I do with these and the boat is always in the water in a slip.
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