Oil Lubrication System - Polaris msx 110 Service Manual

ENGINE DISASSEMBLY / ASSEMBLY

Oil Lubrication System

The lubrication system features two oil pumps. The first pump is the low pressure pump that pumps oil to the
oil cooler, and then on to the oil storage tank. The second pump, high pressure, is located on the PTO end of
the engine crankcase. The high pressure pump draws oil in from the oil storage tank, and supplies oil to all of
the internal engine components. The low pressure pump supplies approximately twice the amount of oil to the
oil storage tank than what the high pressure pump requires. This ensures a constant supply of oil.
A small amount of pressurized oil is supplied to the turbocharger bearing house and oil storage tank anti--siphon
valve. The anti--siphon valve is located on top of the oil storage tank. The valve works by preventing oil from
the tank to back--feed into the engine in the even that oil pressure is lost. (Watercraft Rollover)
Low Pressure Oil Circuit
ENGINE
SUMP
High Pressure Circuit
OIL STORAGE
TANK
HIGH
PRESSURE
PUMP
RELIEF VALVE
DRAIN TO SUMP
2004 Four Stroke PWC Service Manual
OIL COOLER
OIL FILTER PISTON OIL JETS
OIL STORAGE
TANK
CRANKCASE
MAIN BEARINGS
BALANCE SHAFT
BEARINGS
ANTI SIPHON VALVE
CYLINDER HEAD
VALVE TRAIN
TURBO
4.65