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Old 04-09-2013
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Re: Yanmar 2QM15: How can I keep it running forever?

Originally Posted by Rusty123 View Post
My understanding is that periodic flushing with Rydlyme or equivalent will get rid of the scaling, but short of converting to FWC (and replacing the zincs on time), is there anything I can do to keep the corrosion at bay?
I don't know if it good or bad (different opinions on this), but I fresh water flush my 30 year old Yanmar 3gmd (direct sea water cooled) engine after each use on return to the dock. I would rather have fresh water than salt sitting in the engine when not in use.

As far as the red lyme acid flush, I have heard that this could cause more problems than it solves. The acid could attack your "good" metals in the engine and cause more rapid corrosion than necessary. I am thinking of doing a 24 hour 50% vinegar and water soak then flush with water.
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