2004 Poalaris MSX110, MSX150 PWC Original Service Manual, Page 121Get this manual
ENGINE DISASSEMBLYASSEMBLY Crankcase Ventilation
Engine blowby is recovered via the oil separator or cycloneThe oil separator is located on the oil storage tankEngine oil and fuel vapors are collected in the top housing of the oil storage tankThese vapors are routed to the separatorHeavy elements such as oil and unburned fuel are collected at the bottom of the separator and are routed back to the crankcase sumpThe remaining vapors are collected at the top of the separator and routed to the air intake flame arrestor where they are drawn into the intake air stream and burned
Crankcase Ventilation Circuit
OIL SEPARATOR OIL STORAGE TANK CRANKCASE SUMP
FLAME ARRESTOR
Low Pressure Pump RemovalInstallation
NOTE: The engine must be removed to access the low pressure pump1Remove the crankcase bedplate from the lower crankcase2Remove the fasteners securing the screen to the bedplate and pump3Remove the pump from the bedplateNOTE: The low pressure pump is not serviceable and must be replaced as one component is when operation is suspect