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Hello,

I recently had my serpentine belt shred itself to almost bits but was able to get the remainder of the belt back on and limp home. Indications were lost power steering and then the engine overheat warnings came on. So once back in port I took the boat out of the water and replaced the serpentine belt and impeller. Trailer fired the engine and everything worked fine. Then I put the boat back in the water and in the short transit to the slip the exhaust overheat warning came on as did the engine overheat. Serpentine belt was still attached so after everything cooled I decided to look at the impeller and see if it was defective which it was not. I noticed the threaded side was facing out so I turned it around and closed everything back up. Started engine and cooling system works fine now....never though that the impeller could be installed incorrectly but I was able to pull it off. Anyway shortly thereafter the engine exhaust overheat warning came on which caused the motor to go into a safe mode limiting rpm. At this point I have no idea what I could have done to cause this other than a bad transmitter or potentially air in the cooling system. I checked all the wiring and everything looked attached. Any assistance would be appreciated!

Xman214

Mine overheated back in April and after swapping out 2 impellers I ended up installing a new water pump. Problem solved.

Last year my boat ran at around 180/190. Now its 160. The tech told me that something the inside of the pump wears, allowing water to get by. It will gradually run warmer and warmer until it fails. I didn't think it was possible for the inside of the pump the wear past tolerance, but it sure fixed the problem after replacing.

As Ytmsn mentioned waterpump movent May have caused the loss of the belt to start. Are you missing any pieces from the original impeller? It may require backflushing as coolers can hold up flow.

As the bearing goes on the water pump, the pulley starts to wobble and the belt can shred. Not unusual.

- Mark