I am currently working on a 1986 Carver Mariner with a pair of 220 engines with FWC. Engines run flawless. The problem we are having is that under load (2800 and up) they will creep to the 180-190 mark and start to push a little anti-freeze. These engines have been freshwater their whole life. Wondering if anyone can help with any common problems these engines had for the moderate overheat i am dealing with. Seawater pump impellers have been replaced. Thanks for any advice. Dan
