Yanmar Tips

[Esrom]

Hi a64pilot, thanks for your suggestion, but as I stated, I'm a fresh water lake sailor and this boat has never seen salt water in its long life. I understand about the aggressive corrosion and salt deposit problems of warm seawater, but as Gord May said in his excellent "Yanmar Tips" posting, 130 degrees is good for Yanmar seawater operation and 140 is better if in fresh water. However the old Yanmars came with 110* thermostats and 140* temp alarm sensors and Yanmar never bothered to increase those ratings for their spare parts, when they increased the operating temp for all their newer engines.
Sure the motor runs, but it cokes-up, has smelly (unburned) exhaust and runs rough, same as any diesel will if it's consistently too cold.