impeller failure
Several years ago while motoring down the ditch, the A4 got hot. On investigating, the fresh water pump impeller rubber had separated from the brass which continued to turn with the shaft but the rubber quit turning. The impeller rubber was still in good shape; no cracks or broken fins.
Would this be caused by the antifreeze acting on the glue holding the two together?
Fortunately there was enough hose on board to hook the salt water pump to the engine and we continued to Beaufort where we obtained another impeller, flushed the engine with fresh water and refilled the cooling system with antifreeze.
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