Honda HRS216PKA Manual page 78

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HRS216PKA • HRS216SKA • HRS216VKA
6. EVAPORATIVE EMISSION CONTROL SYSTEM
FUEL TANK CAP
This engine has an EVAPORATIVE EMISSION CONTROL CANISTER built into the fuel tank cap to prevent the
escape of gasoline vapors into the atmosphere. The cap also contains a ratchet mechanism to provide the operator
with feedback to indicate that the cap is sealed.
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.
FUEL TUBES
Use only low permeation fuel tubes. These fuel tubes have the
emissions-compliance identification number printed on the tube
as shown in this example.
FUEL TANK
This lawn mower has a low permeation, multi-layer fuel tank. If
the fuel tank is scratched deeply enough that the light gray inner
liner can be seen, the fuel tank must be replaced.
INNER
OUTER
LAYER
LAYER
DEEP
SCRATCH
If the outer layer is scratched deeply enough for the
light gray inner layer to show, replace the fuel tank.
FUEL SYSTEM
7-19

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