I recently got this 1997 boat with volvo penta 3.0 in it. My outdrive is a penta cobra sx. I had a fuel pump problem but have installed a new one and cleaned out the gas tank. There is some sort of flush kit on the motor you can put a garden hose on, but when I did it blew off the water hose that was clamped to the thermostate housing. Is this not the way to run it????, should I use muffs to run it???.............thank you...........new to I.O.'s