Quote:
Originally Posted by MAXUM
Another thought too, the alpha has the impeller placed right above the water inlet in the stern drive housing therefore the flow of water into the casing doesn't have to go far before it hits the pump. With a more "remote" setup on the bravo that impeller has to spin fast enough to create a decent vacuum to overcome gravity (right?) so it makes sense it'd need to spin faster. If that thing even momentarily runs dry I can see where that would seriously reduce it's live expectancy.
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The Bravo impeller needs to be able to handle suction head since it can be above the water line. The Alpha only needs to be able to handle pressure head since it's always operating below the water line. That's why they are different designs and why they don't use the Alpha design on Bravos.