I have this unit in my shop ,sunk after blowing the water outlet to the fire pumps.Seadoo trihull powwered with a 175 sportjet as propulsion and a120 sportjet to operate the hose pump.Problem is I can find no info on this unit online and the pump unit is now overheating.Anyone out there even seen one of these odd looking creatures?Do I need to maintain back pressure at the hose outlet to feed the engine?