Hunter MH37 - Troubleshooting

Troubleshooting
Problem Possible Cause Solution
Engine not starting No fuel reaching engine
Improper starting procedures
Contaminated fuel
Fuel tank vent blocked. Clean hose
and fitting to remove material. Make
sure hose is not pinched.
Fuel line obstructed. Check fuel
lines. Make sure line is not pinched
Clogged engine fuel filter. Refer to
engine manual for instructions on
cleaning filter.
Fuel supply valve closed at tank.
Open valve. Review starting proce-
dures in engine manual. Inspect for
water or other contaminants in fuel.
If contaminated, drain tank and flush
with fresh fuel.
Engine starter not cranking Discharged battery
Corroded battery terminals
Loose battery terminals
Bad starter switch
Hydrolock
Jammed “starter drive.”
Recharge or replace battery.
Clean battery terminals.
Tighten connections.
Test switch continuity. Replace
switch if required. See your dealer
for service. Replace switch.
See instructions in this Section under
“Hydro-Lock”. Contact your dealer
immediately.
Loosen starter motor, then free stuck
gear.
Engine speed erratic Pinched or clogged fuel lines
Contaminated fuel
Replace line or remove obstruction.
See your dealer for service.
Drain fuel tank and lines. Flush with
clean fuel and replace fuel filters.
See your dealer for service.
Engine running rough Defective fuel pump
Idle speed too low
Faulty ignition system components
Clogged fuel filter
Pinched fuel lines
Clogged fuel lines
Blocked fuel vent
Have your dealer check pump.
Check idle speed and adjust as
needed.
See your dealer for service.
Clean or replace filter.
Straighten lines.
Remove obstruction.
Clean vent.
Engines and Transmissions
11.8