2004 Hunter 33 high temp alarm


Dec 15, 2006
Catalina Catlina 310 Campbell River BC
you may want to check your thermostat it could be at fault


Sep 17, 2014
Hunter 33 Oriental, NC
Ouch! In 2019 I paid $713, including tax, from Deatons in Oriental.
I don't have the part number.
Jun 25, 2004
Hunter 306 Pasadena MD
On our 2004 Hunter (Yanmar 2GM20F) the only engine overheating I've experienced turned out to be because a vane had broken off the impeller and was partially obstructing the flow. When I noticed it was gone, I poked around, but basically I was too lazy: so at first, I just replaced the impeller. After one particularly scary time (the engine temp alarm went off in a high wind, high worry situation), I decided to pull all the hoses between the water pump and the heat exchanger. I found the chunk of rubber in the end-cap of the heat exchanger and removed it. No problem since then.

I believe you said it's a new-to-you boat, so maybe the PO had an impeller break up before you got it? It's pretty easy to check the heat exchanger.