Manual

FUEL SYSTEM AND GOVERNOR

Troubleshooting the EVAP system

NOTE: Troubleshooting a charcoal canister fuel cap is the same as troubleshooting a non-EVAP system.

Symptom Cause

Fuel leaking from the

carburetor throat or

vents

A blockage in the charcoal

canister or between the

canister and the tank.

Engine starts, then

stalls

• Roll over valve stuck

closed.

• Plugged vent line or

charcoal canister.

• Raw fuel in the char-

coal canister.

Engine runs rich • A blockage in the line

between the char-

coal canister and the

carburetor insulator

plate.

Engine runs lean • Wrong fuel cap

installed.

• Leak in the vacuum

lines.

Gasoline vapor

escaping from the

engine

• The charcoal canis-

ter is saturated.

• A blockage in the

line between the

charcoal canister

and the carburetor

insulator plate.

• Wrong fuel cap

installed.

• Leak in the vacuum

lines.