2003 DF 115 overheating

[chad.george]

Just bought this 2003 DF 115 four stroke. Only 60 hours when I bought it a couple months ago. Ran great for the first weekend we had it in the water. This past weekend, I started getting an occasional overheat light that grew steadily worse. I now get the overheat light immediately when I turn the key to the "on" position before I even crank the engine. I'm guessing it's a bad sensor or thermostat since the overheat light comes on before I even crank the engine. Thoughts??

[catacom225]

Chad, are you saying the overheat light is coming on when you turn key? does it stay on or does go out with the other two ie: over rev limit and check engine lights.

[Hoosmatroos]

Could be the temp sensor. Locate it, remove the cable and check again. If the light stays out the the sensor is your problem.

[artdf175]

Sounds like a bad sensor
However with the age even with very few hours the waterpunp impellors need replacing
They are compressed inside the housing and lose their flexibility and pumping ability
Art