I cant find an answer to this dilemma. A friend removed port side water pump, I’m replacing, not marked up or down, a sherwood G21 pump. Put it in the same as the starboard engine, engine rotation is left for port and right for starboard. Did I put it in opposite? Also, the impeller roasted. Thru hull is open. There was water flowing in the sea strainer at first..either i put it in backward, it’s defective or there was an air leak, what else? Mostly wondering if it should be opposite of the other engine, but it didnt seem to want to fit that direction.