1B-2 Emission Control Devices:
Crankcase Emission Control System Description
B649G11201006
The engine is equipped with a PCV system to prevent discharging crankcase emissions into the atmosphere. Blow-by
gas in the engine is constantly drawn into the crankcase, which is returned to the combustion chamber through the
PCV hose, air cleaner box and carburetors.
1
2
“A”
“B”
“C”
“D”
“E”
“F”
I649G1120006-02
1. To PAIR control valve “A”: Blow-by gas “C”: Fuel/Air mixture “E”: Vacuum
2. PCV hose “B”: Fresh air “D”: Fuel emulsion “F”: Exhaust gas
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