Hello fellow boating enthusiast. I recently purchased a 1993 sea rayder with sport jet 90 in it. And i happen to have a gallon of barnicle buster laying around what is your guys take on circulating it thru the engine for a few hours. I only have the customer flush kit that goes by the thermostat but i can go to lowes or HD and get the fitting for the lower exhaust manifold. About the pressure of the circulating pump i can throttle it manualy after the pump. Any suggestions? Do i take the thermostat out? Is there any things i should be cautious about? Has it been done before?