Engine temperature overheat

[Capt Tim]

Hey all!

Just bought a 1984 Trojan 9 meter. It has the 350's in it and has new risers and all new hoses, water pumps rebuilt last summer prior to use. The old owner said it has about 5-8, yes 5 to 8 hours all last Summer. He was getting up in age and could not do what he wanted to so he decided Tim sell. I bought it and ran it up from Ocean City, Md, to Cape May, NJ. The port engine ran at 170 degrees the entire run, 2800 RPM's at 20 knots with a following sea. Awesome riding boat and a great ride. At Cape May inlet it hit 180 and started to shut down, I cut it back and it cooled right down to 150, ran at 1500 RPMs the rest of the way.

Any suggestions? I am going to pull the pump, thermostat to start but if you guys know any other tricks with these I am open to them. Thanks!

Tim

[Stripermann2]

Things to also check.
Restricted opening in the sea cocks, strainers clogged, transmission cooler clogged, impeller damage, clogged risers.
Are they, 454's (350hp) or 350 V-8's? I also assume fresh water cooled since you didn't mention it?

[1967 seavoyager]

I think I'd look at the pump impeller first & go from there.