please help impeller problem 9.9

ziekertail

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Joined
Jun 1, 2006
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hi i have a early 90,s 9.9 merc i changed the impeller in it but i have to rev it up to get water to come out of the top port the bottom on my shank has good water movement could someone help me out with why my top water pressure problem thanks in advance ,shawn
 
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