2017 Merc 115 overheat alarm

[bcfitzgerald]

I'm getting an overheat and power de-rating on my merc. It's got 150 hours on it and the water tell seems strong. Vessel View says the temperature is 75 degrees Celsius. I don't think that is too hot. Anyone have some ideas?

 

[QBhoy]

I'm getting an overheat and power de-rating on my merc. It's got 150 hours on it and the water tell seems strong. Vessel View says the temperature is 75 degrees Celsius. I don't think that is too hot. Anyone have some ideas?

Yeah. That’s too hot for that engine. Mine runs mostly at about 52-56 degrees C. They run colder than any other I’ve previously been used to. Time to change the impeller, check the water strainer up top too. T stat on these have been known to cause an issue too. These have a cooling feed to the FSM, to be aware of also.

 

[bcfitzgerald]

Yeah. That’s too hot for that engine. Mine runs mostly at about 52-56 degrees C. They run colder than any other I’ve previously been used to. Time to change the impeller, check the water strainer up top too. T stat on these have been known to cause an issue too. These have a cooling feed to the FSM, to be aware of also.

Thanks for the info.

 

[QBhoy]

Thanks for the info.

No probs.