S
Steve Carpman
We just completed our first year with our 1991 37.5 Legend. I have read many of the comments on this web site regarding mixing elbow maintenance. We have experienced infrequent engine overheating at cruising RPM's (approx 2750) and have had black soot build up on the transom - both are possible indicators of a clogged mixing elbow. One of the things we have learned to do is to let the engine idle for several minutes and then run up to 3000 RPM's just before turning it off. This seems to help minimize the soot build up.Before undertaking the replacement of the mixing elbow, I am interested in finding out whether a boat that has spent its entire life in the great lakes and is generally on the hard with anti-freeze in the fresh water cooling system for 6-7 months per year, should have the same mixing elbow maintenance as a salt water boat. Does anyone have any experience here?