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Fuel Filter
Your Bush Hog utility vehicle is equipped with an in-line fuel filter that
should be replaced by your dealer after every 100 hours of opera-
tion.Do not attempt to clean the fuel filter.
Spark Plugs
The spark plugs should be changed every 100 hours. The spark plugs
are accessible from under the seat or under the cargo box. Always use
the spark plugs recommended by the engine manufacturer and set the
gap as specified.
Spark plug condition is indicative of engine operation. The spark plug
firing end condition should be read after the engine is warmed up and
the vehicle is driven at higher speeds. Immediately check the spark
plug for correct color.
1. Normal
The normal insulator tip is gray, tan, or light brown. There will be few
combustion deposits. The electrodes are not burned or eroded. This
indicates the proper type and heat range for the engine and service.
NOTE: The tip should not be white. A white tip indicates overheating,
caused by use of an improper spark plug or incorrect carburetion
adjustments.
2. Wet Fouled
The wet fouled insulator tip is black. A damp oil film covers the firing
end. There may be a carbon layer over the entire nose. Generally, the
electrodes are not worn. General causes of fouling are excessive oil,
use of non-recommended injection oil, improper use of the choke. or
incorrect carburetion adjustments.
Spark Plug Removal and Replacement
1. Open the seat and/or the cargo box to access the engine compart-
ment.
2. Remove the spark plug boot and using a socket wrench, remove
the plug.
3. Reverse the procedure for spark plug installation. Torque to 14 ft.
lbs. (19 Nm).
WARNING
A HOT EXHAUST SYSTEM AND ENGINE CAN CAUSE
SERIOUS BURNS. WEAR PROTECTIVE GLOVES WHEN
REMOVING A SPARK PLUG FOR INSPECTION.
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