Section 5 • Troubleshooting
Part No. 218567
AL4 • AL4000
5 - 3
August 2016
TROUBLESHOOTING
Engine turns over but will not
start or is diffi cult to start
Empty fuel tank
Add fuel to tank
Clogged fuel lines or tank
Inspect and repair as needed
Leaking or pinched fuel lines
Inspect and repair as needed
Clogged fuel fi lter
Replace fi lter
Air or water mixed in fuel
Air: Tighten fuel lines and vent
fuel system air at injection pump.
Water: Drain fuel and replace
fi lter; inspect and clean or replace
injector as needed.
Engine runs rough
Clogged or leaking fuel system
Replace fuel lines, tighten all
connections, inspect the fuel
pickup tube and inspect the fuel
fi lter
Air or contaminated fuel in fuel
system
Inspect and repair as needed
Possible Cause
Solution
Problem
Faulty glow plug
Inspect and repair as needed
Battery is discharged or low
Charge or replace battery
Air cleaner is dirty
Clean or replace more frequently
Clogged exhaust system
Inspect and repair as needed
Clogged air fi lter
Inspect and repair or replace as
needed
Clogged or stuck fuel injectors
Inspect and repair as needed
Faulty governor or fuel pump
Inspect and repair as needed
Fuel injection nozzle clogged
Inspect and repair as needed
Fuel injection pump faulty
Inspect and repair as needed
Fuel solenoid valve faulty
Inspect and repair as needed
Faulty relay or wiring connection
in control box
Inspect and repair as needed
Engine battery quickly discharged
Battery electrolyte low
Add distilled water and charge
Wiring loose or disconnected
Inspect and repair as needed
Fan belt slips
Inspect and repair as needed
Faulty alternator, rectifi er or diode
Inspect and repair as needed
Faulty battery
Replace
Discount-Equipment.com
