Evaporative Emissions System: Description: Notes

The sealed fuel evaporation system prevents fuel vapors from escaping to the atmosphere. Vapors from the fuel tank are trapped in a charcoal canister. The system consists of a non-vented fuel tank filler cap, an expansion chamber built into fuel tank, an activated charcoal canister, and a series of vent lines which interconnect the components between the fuel tank and air cleaner. The charcoal canister is also connected to the fuel tank vent system.

On air cooled engines, a pressure line (used to purge the system), is connected between the engine blower assembly and the charcoal canister. Some models also use a separator to prevent the entry of liquid fuel into the system. On Dasher, only a fuel vapor restrictor is installed in vent line.