The Hunter 32 Vision comes with a 3 cylinder, naturally aspirated Diesel Engine. We named ours Greg. Why? ask Joe.
Greg gets hot. As you would imagine from an engine in an insulated box plowing 15 thousand pounds through water when the wind wont cooperate. We can putz along at about 5-6 knots happily with Greg working away, drinking a half gallon of Diesel an hour…buuut as soon as we need to go 6.5 knots, Greg shouts at us and shuts off.
Technically speaking, our Yanmar 3GM30-F (Greg) has been fantastic. Its reliable, efficient, and provided heat, hot water, propulsion and electricity to us all summer without so much as a hiccup.
The cooling system pulls salt water in, transfers heat in a heat exchanger, with the engine coolant, and then spits out the hot salt water with the exhaust. Something in this process is not happening as effectively as it should, and we’ve looked at replacing just about every component of the system. Yanmar and Yanmar Forums provided a checklist of 19 things that can be done to troubleshoot an overheating Greg, and this summer we did numbers 1-17.
Updates on Greg and his feisty attitude to follow. Stay Tuned.
Oh, and Joe HATES the name Greg and all people named Greg, so feel free to send suggestions to update the name of our motor.