
TROUBLESHOOTING AND ELECTRICAL SYSTEM
Troubleshooting Guide
Page 11-2
2005 FE350 Gasoline Vehicle Maintenance and Service Supplement
11
Engine starts but does not run
smoothly.
Spark plug is fouled or in poor condition
Section 13 – FE350 Engine
Spark plug wire is damaged or loose
Section 13 – FE350 Engine
Intermittent ignition coil failure
Section 11 – Troubleshooting and
Electrical System
Test Procedures 12, 13, and 14
Water or dirt in the fuel system and/or
carburetor; dirty or clogged fuel filter
Section 14 – Fuel System
Fuel pump malfunction; fuel pressure to
carburetor too low
Section 14 – Fuel System
Engine turns but fails to start.
Fuel tank is empty
Section 14 – Fuel System
Fuel line or filters clogged
Section 14 – Fuel System
Fouled spark plug
Section 13 – FE350 Engine
Spark plug wire damaged or loose
Section 13 – FE350 Engine
Loose wire connection at ignition coil or
RPM limiter
Section 11 – Troubleshooting and
Electrical System
Test Procedures 14, 15, and 16
Ignition coil or RPM limiter failed
Section 11 – Troubleshooting and
Electrical System
Test Procedures 14, 15, and 16
Engine flooded with fuel as result of
excess choking
Vehicle Owner’s Manual, Controls and
Indicators. See Choke.
Kill circuit grounded
Section 11 – Troubleshooting and
Electrical System
Test Procedures 14, 15, and 16
Fuel pump malfunction or failure
Section 14 – Fuel System
Relay failure (key-start vehicle only)
Section 11 – Troubleshooting and
Electrical System
Engine overheats.
Fan screen is partially blocked or plugged
Section 13 – FE350 Engine
Governor is improperly adjusted
Section 14 – Fuel System
Carburetor is too lean; check main jet size
Section 14 – Fuel System
Engine pre-ignites.
Excessive carbon deposits on piston head
or in combustion chamber
Section 13 – FE350 Engine
Spark plug heat range is incorrect
Section 13 – FE350 Engine
Unsuitable or contaminated fuel
Section 14 – Fuel System
Loss of engine power.
Exhaust valve is restricted with carbon
deposit
Section 13 – FE350 Engine
Muffler or exhaust pipe restricted with
carbon or other substance
Section 15 – Exhaust System
Ignition coil failed
Section 11 – Troubleshooting and
Electrical System
Test Procedures 14, 15, and 16
Air filter is dirty or clogged
Section 14 – Fuel System
Governor is improperly adjusted
Section 14 – Fuel System
Troubleshooting Guide continued on next page...
TROUBLESHOOTING GUIDE
SYMPTOM
POSSIBLE CAUSES
CORRECTIVE ACTION