Reply To: Running Temp

[Mumbles]

The stat is rated at 143° F so anything much above this would be concerning. Mind you, some motors do have hot spots on them which can be well above 143 but are nothing to worry about. If the motor runs hotter than 160° F, minerals can leach out of the water causing buildup in the water jackets and that’s why outboards run at lower temperatures than vehicles do. A hand held infrared thermometer works best for checking temperatures.