have a 98model 75hp yamaha, got boat from freind who fished salt water, a-lot. changed water pump and installed a whole new water pump kit. still not pumping the way it should, motor not running hot, but just don't think it's right. boat was last used in salt water and set up for 6 months, with out being flushed. the water pump housing and jacket where hard to get a-part(lot of salt corsion). 