Re: Yanmar 2QM15: How can I keep it running forever?
Seakamp Engineering (Bellingham), or AAA Marine in Tacoma can supply nice little heat exchangers that might be worth looking into, but it is a pricey project. You would preserve the current condition of any loss of metals due to corrosion with RWC in play.
Absent the desire or motivation to convert, be sure to keep zincs in good shape (which has hopefully been done up til now)
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)