Overheat light

[bigdaddyslim66]

So two of the last three times I was out on the river, the starboard side engine overheat light came on. I turned it off, checked the port clean outs (nothing there) and had checked the oil before departing out. And checked the pissers throughout the time out and they were doing their thing. Each time after doing these checks and waiting about 5 minutes, I started her up and the light was off and didn't come back on.

Last Saturday, it came on, Sunday, it did not, Tuesday, it came on again. So it's intermittent and it's only the starboard side.

One time out the water was choppy and I thought there wasn't enough water getting to the intake. The second time, this past Tuesday, the water was like glass and we were pretty much alone out there so we were tubing, running hard. On the way in, I was cruising at 35-40 (it was getting dark) and that's when the light came on. Any ideas on what could be causing this? Is there a service manual produced that could help me find some troubleshooting for this. Really scratching my head on this one.

 

[Scottintexas]

have you watched the video "how the cooling water flows" in our FAQ tab, it gives a great description and also shows you where the sensors are

where are you at? update your profile so we know where you boat,
how long have you owned the boat?
if it's used do you know if it was ever in salt water?

since your indicator lines always appear to be working even during the overheat light, I think I would take an infrared thermometer the next time out and check some spots on your engine and your exhaust manifold vs. the good engine for comparison,

It could be a sensor gone bad but that's not a "common" issue and would be unusual,

you should also consider buying a YDS unit off ebay so you can see your engine data in real time (including temp.)


.

 

[Scottintexas]

it also would probably be worth your time to remove the anode or thermostat on the engine just to see if there is any corrosion or deposits on them as that would be a telling sign,

they're both shown in the video,


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[Scottintexas]

you can probably google search for a free service manual download someone may gave posted,

 

[WREKS]

Have you run in shallow water?