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Old 05-02-2012, 09:05 AM
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sastanley sastanley is offline
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I agree with Hanley...some piece of trash (maybe an old piece of impeller or something similar) is lodged in the water jacket somewhere..it flops around for a while and eventually jams itself at an exit point like a hose barb & water flow stops. When you shut down the engine and stop pulling water into the pump, it dislodges and rests again until you restart and it gets lodged at the exit point again.

It will be tough to nail this one down!
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