Can a boat be flushed while it is in the water (salt water) using the flush kit that the dealers install? I always thought the boat had to be out of the water so that it wouldn't suck up saltwater at the same time, but a friend of mine, who worked for a dealership, said that it can be flushed in the water because the water pressure from the hose wont let the engine suck in any salt water. Is this true or does it have to be out of the water?
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