backward impeller?

Jeepers

Member
Sep 28, 2010
229
Atlantic City,NJ
Boat Info
1989 390ec
Engines
454x2
trying to help a friend, long distance phone, diagnose a problem. he recently changed both impellers, twin inboard 454. when he starts motors one starts showing exhaust water immediately, the other takes a few seconds and the flow is slow. I told him I think he put that impeller in backwards. would it still move water if that was the case? oh yeah, it's the pump that rather "difficult" to get to, otherwise he would probably just pull it out and look
 
If you install backwards it will right itself with the first rotation.
No damage...
 

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