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Old 05-12-2015, 09:45 AM   #5
Senior Member
City: St James City Fl
Country: USA
Vessel Name: Paradox
Vessel Model: Mainship
Join Date: Oct 2013
Posts: 165
Replace zincs after treatment. It will eat them. The pump and use of 5 gal bucket allows solution to circulate and thoroughly clean an old system. Using the engine pump seems like a waste of the acid. Did not try that way. We disconnected the water into exhaust fitting and the main engine inlet hose. This creates a closed loop and circulated 5 gals of mix for over an hour and then allowed to sit for a few hours. Changed out the mix with fresh and ran it for awhile until it came out clean. Very easy! Then installed new zincs and impellers. HTH
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