Still Overheating

Chris,
Overheating at speed can be a T stat problem or blockage. Sucking air on the suction side of the RWP typically shows up at idle. Have you taken an IR reading to confirm the temp?

Pete not to thread jack here but do you think there are times that the gauges are supposed to read from a ballast resister in the system or just straight 12 volts   i am asking because my corvette usually reads an avg of 165   and if i use any one of 3 different temp scans and remote bulbs to read actual temp i find that the gauge reads higher than it ever has    the only difference is that i removed a ballast resister in the ignition circuit   when it says 210-220 every test i try says its 165 = or take

thanks i though so

seacamper wrote: cmacbuck69 wrote: I went through the whole rigamaroll with the overheating problem and had it nailed at 160 with the bucket in the driveway. I finally have it back on the water and with s load on it the gauge is showing around 200 again. Any thoughts on this? I have gone through and tightened al of the hose clamps to make sure I was not sucking air at connections... So frustrated! New RWP? What boat do you have? Do you have a dual exhaust? Is the amount of water coming out of each exhaust about the same on the hose?

If it's not coming out equally, what does that mean?

Had this problem with my 88. Threw all kinds of parts at it. clamps, hoses, tstats, impellers, o ring seals, sending unit, etc. Checked and tested the RWP and then checked and tested all again. I had an infrared thermometer gauge that I ended up using to confirm that it was not running hot despite what the dash gauge said.

I ordered a replacement temp gauge but ended up selling the boat before installing the gauge to verify the problem.

Frustrating experience.. good luck.

Seeing your from Jacksonville where were you running it?

No I'm just thinking it looks pretty clogged up for fresh water

Ah salt... so tasty, so awful for boats. Congratulations on finding the problem.