ENGINE DISASSEMBLY / ASSEMBLY
4.652004 Four Stroke PWC Service Manual
Oil Lubrication System
The lubrication system features two oil pumps. T he 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
OIL COOLER
OIL STORAGE
TANK
High Pressure Circuit
OIL STORAGE
TANK
HIGH
PRESSURE
PUMP
OIL FILTER
RELIEF VALVE
DRAIN TO SUMP
CRANKCASE
MAIN BEARINGS
BALANCE SHAFT
BEARINGS
CYLINDER HEAD
VALVE TRAIN
PISTON OIL JETS
ANTI SIPHON VALVE
TURBO
To Next Page
Loading...
Need help?
General