F200 high temp alarm

[Caucoin71]

Hi I have a 2005 Yamaha f200 and is having high temp alarm going off couple of times when out I could be idling or running but engine is not overheating test it out with a Yamaha computer program . I recently change therrmostats I think it might be the sensor going bad ? Or it could be something else. Anybody has any answers of what it could be

[99yam40]

lots of things beside stat could cause over heating,
have you checked temp where the over temp gets it's info?
just to make sure that area is not overheating?

[GarryIno]

Hi... there is a little plastic ring that helps seal the entire pump. I had something very similar occur at low RPM's, I took the plastic lodging off, and there is a ring that goes in the upper piece of the lodging around the shaft. Watch that, it could be broken. It is incorporated as a feature of the water siphon pack.

[Caucoin71]

I did check the temp around the engine and it was consisted with the program I have with everything running normal

[boscoe99]

Temperature values that are seen via a YDIS program or a Command Link network do not correlate with the temperatures that can cause a thermoswitch to close and sound the alarm. Two completely separate systems.

Few ever want to know how systems work. I don't understand.

[99yam40]

so you have not pulled the temp sensor and tested it ?
or measure the temp in that hole when the overheat alarm comes in?
is it a blind hole or wet.

If you are sure it is an over heat alarm and you are sure the motor is not overheating you should test the sensor