Honda GX120 Owner's Manual page 15

TAKING CARE OF UNEXPECTED PROBLEMS
ENGINE WILL NOT START
Possible Cause
Battery discharged.
Fuse burnt out.
Fuel valve OFF.
Choke open.
Engine switch OFF.
Engine oil level low (Oil Alert
models).
Out of fuel.
Bad fuel; engine stored without
treating or draining gasoline, or
refueled with bad gasoline.
Spark plug faulty, fouled, or
improperly gapped.
Spark plug wet with fuel
(flooded engine).
Fuel filter restricted, carburetor
malfunction, ignition
malfunction, valves stuck, etc.
ENGINE LACKS POWER
Possible Cause
Filter element(s) restricted.
Bad fuel; engine stored without
treating or draining gasoline, or
refueled with bad gasoline.
Fuel filter restricted, carburetor
malfunction, ignition
malfunction, valves stuck, etc.
Correction
Recharge battery.
Replace fuse (p. 15).
Move lever to ON position.
Move lever to CLOSED position
unless the engine is warm.
Turn engine switch to ON
position.
Fill with the recommended oil to
the proper level (p. 9).
Refuel (p. 8).
Drain fuel tank and carburetor
(p. 14). Refuel with fresh
gasoline (p. 8).
Gap or replace spark plug
(p. 12).
Dry and reinstall spark plug.
Start engine with throttle lever
in MAX. position.
Take engine to your servicing
dealer, or refer to shop manual.
Correction
Clean or replace filter
element(s) (p. 11–12).
Drain fuel tank and carburetor
(p. 14). Refuel with fresh
gasoline (p. 8).
Take engine to your servicing
dealer, or refer to shop manual.
FUSE REPLACEMENT (applicable types)
The electric starter relay circuit and battery charging circuit are
protected by a fuse. If the fuse burns out, the electric starter will
not operate. The engine can be started manually if the fuse burns
out, but running the engine will not charge the battery.
1. Remove the 6×12 mm special screw from the rear cover of the
engine switch box, and remove the rear cover.
2. Remove the fuse cover, then pull out and inspect the fuse.
If the fuse is burnt out, discard the burnt-out fuse. Install a new
fuse with the same rating as the one that was removed, and
reinstall the cover.
If you have questions regarding the rating of the original fuse,
contact your Honda servicing dealer.
Never use a fuse with a rating greater than the one originally
equipped with the engine. Serious damage to the electrical
system or a fire could result.
3. Reinstall the rear cover. Install the 6×12 mm screw and tighten
it securely.
FUSE
COVER
FUSE
Frequent fuse failure usually indicates a short circuit or an overload
in the electrical system. If the fuse burns out frequently, take the
engine to a Honda servicing dealer for repair.
ENGLISH
ENGINE SWITCH
REAR COVER
6 ×12 mm
SPECIAL SCREW
15