More strange f225 cooling issues

[Keith Ohanesian]

So my F225 txr"d" Drove me crazy today. Last night the over heat alarm would go off at idle speed. The temp wasn't over 190 on my MFD. So today I narrowed down which themo it was. Starboard side and figured it was the switch. It wasn't, I guess it was the 2 month old thermostat. It was stuck closed cause that head to get hot.

[pstephens46]

So my F225 txr"d" Drove me crazy today. Last night the over heat alarm would go off at idle speed. The temp wasn't over 190 on my MFD. So today I narrowed down which themo it was. Starboard side and figured it was the switch. It wasn't, I guess it was the 2 month old thermostat. It was stuck closed cause that head to get hot.

Did you test the thermostat? 2 months old and failure is not typical.

Can’t remember. Did you replace the exhaust stack?

[99yam40]

if the PRV sticks open it will not let as much water to flow thru the block filling it at idle.
one side it prone to see it before the other, but I do not remember which side

[rodbolt17]

pressure valve failure on the F225 is about unheard of.
T stat failure is very rare.
ex stack failure not so much. typically with a ex stack failure you will get an audible with no visual indicate.

[Keith Ohanesian]

The exhaust has not been done yet and still looks good. The PRV was just replaced . First ride with it and noticed more than normal water coming out of the exhaust. When I pulled the stat I flushed it for a while. Put it back together and it would only get to 150 at idle in gear. 190 on plane at 5100 going 40mph. Also noticed no water coming out of the exhaust. What 99yam40 said sounds like what happen.

[pstephens46]

What’s wrong with those temps?

How in the hell do you see water coming out of exhaust at any time while running in water?

[Keith Ohanesian]

What’s wrong with those temps?

How in the hell do you see water coming out of exhaust at any time while running in water?

Those temps are after the repair. Water out the exhaust was at idle

[99yam40]

maybe the OP is talking about the idle relief exhaust ports

main exhaust exists thru the prop, and that should be under water

Rod said the PRV is not a normal problem on those motors, so I hope yours is fixed and it is not the exhaust stack

[Keith Ohanesian]

maybe the OP is talking about the idle relief exhaust ports

main exhaust exists thru the prop, and that should be under water

Rod said the PRV is not a normal problem on those motors, so I hope yours is fixed and it is not the exhaust stack

Yes I was. Yesterday everything was normal.