The topic of engine flushing on a mooring made me evaluate my proceedure of connecting a hose to the hose connector on my engine and running the engine to flush it . From advice from the forums that this proceedure doesn't fully flush the whole engine, I decided to check my service agent for his advice. He catagoricaly states that this connection shouldn't be used when the engine is running as the impeller could be damaged because of lack of lubrication. The only safe way of flushing is to use Muffs from the bottom end of the outboard. Terry