What should temperature be on a Correct Craft Dominique with a 351 and carburator?

[Fatbug57]

Just bought the boat, 1987 Dominique, and it wants to run 190ish give or take at times. If this is not correct please inform me of what I should be looking for or replacing. Thanks

[Jonny Quest]

The standard PCM thermostat for a SBF 351W carby engine is 143 degrees. Keep in mind that a bad sending unit, gauge and/or wiring can affect what you THINK the temperature is. Assuming that everything is working properly, you should be in the 140 to 150 degree range.

With that being said, I ran a 160 degree thermostat on my high-output Ford 351W for many years. No problemo.

JQ

[NautiqueJeff]

190 sounds high. I would expect to see between 160 and 170.

Check the impeller first. Make sure it is in perfect condition. If not, replace it. It is a cheap part, but very important. If that's not the issue, check the thermostat, and then start checking for air leaks throughout the cooling system. Make sure your water strainer has the O-ring in place.