2004 Poalaris MSX110, MSX150 PWC Original Service Manual, Page 120Get this manual
ENGINE DISASSEMBLYASSEMBLY Oil Lubrication System
The lubrication system features two oil pumpsThe first pump is the low pressure pump that pumps oil to the oil cooler, and then on to the oil storage tankThe second pump, high pressure, is located on the PTO end of the engine crankcaseThe high pressure pump draws oil in from the oil storage tank, and supplies oil to all of the internal engine componentsThe low pressure pump supplies approximately twice the amount of oil to the oil storage tank than what the high pressure pump requiresThis ensures constant supply of oilA small amount of pressurized oil is supplied to the turbocharger bearing house and oil storage tank antisiphon valveThe antisiphon valve is located on top of the oil storage tankThe valve works by preventing oil from the tank to backfeed into the engine in the even that oil pressure is lost(Watercraft Rollover)