2001 2900scr

[BigWaveDave]

Got stuck on sand bar but was able to power off. Got sand in heat exchanger and over heated. Ran engine in neutral to blow it out. Seemed to work and got home. On the way home engine ran at 175 degrees at 4000 RPMs. Is this to hot? Could I still have sand in the heat exchanger? mercruiser 7.4

[mmwjr]

I would use a IR temp sensor and take reading on the HE, t-stat housing, exhaust manifolds. 175 is normal for the gauge reading, is this higher than it used to run?

[BigWaveDave]

This is a new boat for me. Only our third outing. I guess I didn't pay enough attention before. I know the alarm goes off not much higher than that say 180 or above. Other than that the boat runs great. Thanks for the help

[mmwjr]

Originally Posted by BigWaveDave

This is a new boat for me. Only our third outing. I guess I didn't pay enough attention before. I know the alarm goes off not much higher than that say 180 or above. Other than that the boat runs great. Thanks for the help

I believe the alarm temperature threshold is 200 F. I still recommend taking the IR reading if nothing else but to baseline the various temperatures so you have that information in case issues arise in the future.

[jparsons121]

I suggest inspecting the raw water pump as a precaution. If you moved that much sand, the impeller/housing may be scored.