Not for
Reproduction
35
Troubleshooting
Engine
Poor engine performance
Fuel:
•
Dirt in fuel system or fuel is old. Replace fuel with
fresh stabilized fuel. Obtain fuel from another sup-
plier before suspecting machine problems. Suppli-
ers blend fuels differently and changing suppliers
will generally solve any performance problems.
•
Fuel blended with alcohol or ether may contribute to
performance problems by causing gum and varnish
deposits, especially if fuel is stored for several
weeks or more. Obtain fresh fuel.
•
Replace
fuel
fi
lter.
Engine will not start or is hard to start
•
Park brake lever not in the ENGAGED position.
•
Check that motion control levers are in NEUTRAL.
•
Stale, low fuel level or improper fuel.
•
Plugged
fuel
fi
lter.
•
Plugged air intake
fi
lter.
•
Spark plug wires loose or disconnected.
•
Spark plugs not gapped correctly.
•
Blown
fuse.
•
Electrical problem – dead battery.
•
Choke applied incorrectly.
Engine will not slow idle
•
Carburetion problems. Contact your authorized ser-
vice center.
•
Bent or kinked throttle cable.
•
Bent governor control.
•
Incorrect governor idle control.
Engine runs rough or stalls
•
Plugged
fuel
fi
lter.
•
Plugged air intake system.
•
Fuel cap vent dirty.
•
Stale or improper fuel/fuel level.
•
Spark plugs not gapped correctly.
•
Replace spark plugs.
•
Choke applied incorrectly.
Engine knocks
•
Engine oil level low.
•
Fuel is bad. Fill tank with fresh fuel.
•
Idle speed too slow. Increase engine rpms.
TROUBLESHOOTING
Using the Troubleshooting Chart
If you are experiencing a problem that is not listed in
this chart, refer to the engine manufacturer’s own-
er’s manual provided with your machine for trouble-
shooting or contact your authorized service center.
When you have checked all the possible causes
listed and you are still experiencing the problem,
contact your authorized service center.
