I have a mercruiser black scorpion 350. The raw water pump shaft seems out of the housing by half an inch. Of course the belt gets misaligned and comes off the pulley all the time.
Did you ever had a similar problem? What could cause this kind of problem?
Yep,had to replace mine beginning of the season.I think it's really important to tighten the bolts to torque specs.(88in.lbs.) when replacing impeller.You can rebuild them,but I couldn't find the parts in stock anywhere so I just replaced whole pump.