Filter
Top Products
D-3
MAINTENANCE
D-3
AIR FILTER PAPER ELEMENT
1. Loosen the cover retaining knob and remove the
cover.
2. Remove the pre-cleaner from the paper element.
3. Remove the element cover nut, element cover, and
paper element.
4. Do not wash the paper element or use pressurized
air, as this will damage the element. Replace a
dirty, bent, or damaged element with a new ele-
ment. Handle new elements carefully; do not use if
the sealing surfaces are bent or damaged.
5.When servicing the air cleaner, check the air cleaner
base. Make sure it is secured and not bent or dam-
aged. Also check the element cover for damaged or
improper fit. Replace all damaged air cleaner com-
ponents.
NOTE: Before air cleaner is reassembled make sure
rubber seal is in position around stud. Inspect, making
sure it is not damaged and seals with the element
cover.
6. Reinstall the paper element, pre-cleaner, element
cover, element cover nut, and air cleaner cover.
Secure cover with the cover retaining knob.
SPARK PLUG
To ensure proper engine operation, the spark plug
must be properly gapped and free of deposits.
NOTE: Before removing spark plug, the muffler
becomes very hot during operation and remains
hot for a while after stopping the engine. Be care-
ful not to touch the muffler while it is hot.
------------------------------------------------------------------------
SPARK PLUG SERVICE
To ensure proper engine operation, the spark plug
must be properly gapped and free of deposits.
1. Remove the spark plug cap.
2. Clean any dirt from around the spark plug base.
3. Use a plug wrench to remove the spark plug.
4. Visually inspect the spark plug. Discard them if the
insulator is cracked or chipped. Clean the spark
plug with a wire brush if it is to be reused.
5. Measure the plug gap with a feeler gauge. Correct
as necessary by bending the side electrode.
6. Check that the spark plug washer is in good condi-
tion and thread the spark plug in by hand to prevent
cross-threading.
7. After the spark plug is seated, tighten with a spark
plug wrench to compress the washer. (See proper
spark plug torque which is specified below).
Spark Plug Gap: .030 in. (0.76 mm)-Kohler Engine
.025 in. (0.64 mm)-Onan Engine’s
Spark Plug Torque:
20 ft. Lb. (27 N-m)-Kohler Engine
11 ft. Lb. (14 N-m)-Onan Engine’s
The spark plug must be securely tightened. An
improperly tightened spark plug can become very
hot and may cause engine damage.
Use only the recommended spark plug or equiva-
lent. A spark plug which has an improper heat
range may cause engine damage.
------------------------------------------------------------------------
RANGER 250
CAUTION
WARNING