Not to hijack this thread, but I still wonder WHY we have these flexable impellers that we need to change all the time. (Aside from the obvious expense that equals profits for the makers).
I have 2 British Seagull outboard motors... both of them have solid impellers like those found in a pedestal sump pump. They work perfectly. So why do we put up with these rubber impellers? My pedestal pump has a 3/4 hp motor on it and it pumps to a 25 foot head. And thinking about it, a regular car water pump also has a solid impeller, and they do just fine circulating the water around the engine. So WHY do we have rubber impellers?????
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1987 V20 w/1987 150HP Yamaha on a Shoreland'r Trailer
1978 16.5 Airslot w/1996 120HP Force on a Four Winns trailer
1996 V21 w/1993 200HP Mercury on a Shoreline Trailer
All towed by a 5.7L Hemi Durango.
If God didn't have a purpose for us we wouldn't be here, so
Live simply, Love generously, Care deeply, Speak kindly.
(Leave the rest to God) 
Silence, in the face of evil, is itself evil. Not to speak is to speak, not to act is to act. God will not hold us guiltless.
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