Cub Cadet MTD 70 Series - Manual (Page 57)

F UEL S YSTEM AND G OVERNOR
51
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.