61, 65 and 70 Series Vertical Shaft Engines
46
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 runs rich • Raw gasoline in the
charcoal canister.
• 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.
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