star engine overheating alarm

[yam240sx]

So I de winterize and head out for a test run within 15 min star engine alarm starts going off ... no obstruction , intake grate clear , impellers clear , strainer clear , both pissers pressure excellent , but notice cool water flowing rather than warm , get it back on trailer after idling back to ramp , hook up to hose flush out with little dawn soap , then rinse with straight water , pull thermostats both clear and function just perfect after testing them , back in same issue alarm starts as soon as start up ... what else could this be ? thanks

 

[Cobra Jet Steering LLC]

that year had bad heat sensors so look into that

 

[yam240sx]

thanks , which ones exactly ? located where ?

 

[Cobra Jet Steering LLC]

it was fixed under warranty and I believe it was up in the front of the engine on the 1800 NA engine the older ones had issues with the one in the muffler

 

[yam240sx]

i had just dropped boat of at dealer .. they are saying 3 weeks just to look at it ! .. almost feel like goin to pick it up , .. how confident based on my first post do you believe its one of those sensors ? i am inclined to think so too , because the engine was not only in like a limp mode but running rich as well , which seems like the sensor was causing that .

 

[Cobra Jet Steering LLC]

How I knew I had a bad one is I took non contact readings of the entire engine and exhaust even the exhaust manifold and could not find any issue with the temperatures, when it was on and when it wasn't but the engine went to limp mode so that made it an issue that had to be dealt with and it was under warranty , you could do a search for the location of them and replace one if it does not fix it move it to the other one and see if that works without needing to buy 2 sensors my issue was intermittent some days it did not cause an issue and others it was a pain .