I have a 1980 18ft with a 224 "470" in it..
I just replaced head gasket, milled head, new valve springs, and a new outdrive
impeller pump. What temp should it run at....I have the themostat out
currently.
The dealer didn't have one and I didn't trust the old one.
Thanks

the 470 runs hot by most marine standards, 170-190 F if it has heat exchanger.
this heat has the tendency to cook the voltage regulator