System - Honda GX120K1 Manual

gx120k1_gx160k1_gx200
GX120K1•GX160K1•GX200 FUEL TANK/GOVERNOR ARM/CONTROL BASE
4. EVAPORATIVE EMISSION CONTROL SYSTEM
The U/UT/U1/UT1 engines have an EVAPORATIVE EMISSION CONTROL CANISTER built into the fuel tank cap to prevent the
escape of gasoline vapors to the atmosphere.
PRINCIPLE
CHARGING:
Gasoline vapor produced in the fuel tank at high
ambient temperature is absorbed and stored by
the charcoal in the canister, which is built into
the fuel tank cap.
PURGING:
When the pressure in the fuel tank decreases
because of low ambient temperature or
consumption of gasoline, the air drawn through
the canister releases the stored gasoline vapor
from the charcoal. The released gasoline vapor
returns to the fuel tank.
7-5