Lower unit or midsection???

gustafsonerik

Petty Officer 1st Class
Joined
Jun 25, 2006
Messages
238
75 merc 500

Engine runs great but when i put it in gear it does go and the water pump stops pumping what can this be?? I pulled the lower unit and i can't see anything wrong with it could it be something in the midsection thanks
 
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