MAINTENANCE
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Air Filter Paper Element Service
1.Loosen the cover retaining knob and remove the cover.
2.Remove the
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 damaged. Also check the element cover for damaged or improper fit. Replace all damaged air cleaner components.
NOTE: Before the air cleaner is reassembled, make sure rubber seal is in position around the stud. Inspect, making sure it is not damaged and seals with the ele- ment cover.
6.Reinstall the paper element,
SPARK PLUG SERVICE
To ensure proper engine operation, the spark plugs must be properly gapped and free of deposits.
WARNING
The muffler becomes very hot during operation and remains hot for a while after stopping the engine. Be careful not to touch the muffler while it is hot.
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 plugs.
4.Visually inspect the spark plugs. 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 pre- vent
7.After the spark plug is seated, tighten with a spark plug wrench to compress the washer.
•If installing a new spark plug, tighten 1/2 turn after the spark plug seats to compress the washer.
•If reinstalling a used spark plug, tighten 1/8 - 1/4 turn after the spark plug seats to compress the washer.
Spark Plug Gap: .030 in. (0.76
.025 in. (0.64
Spark Plug Torque: 20 ft. Lb. (27
CAUTION
The spark plug must be securely tightened. An improp- erly tightened spark plug can become very hot and may cause engine damage.
Use only the recommended spark plug or equivalent. A spark plug which has an improper heat range may cause engine damage.
FUEL FILTER SERVICE
1.Check the fuel filter for water accumulation or sed- iment.
2.Replace the fuel filter if it is found with excessive water accumulation or sediment.
ENGINE ADJUSTMENT
WARNING
OVERSPEED IS HAZARDOUS.
The maximum allowable high idle speed for this machine is 3750 RPM, no load. Do NOT tamper with governor components or setting or make any other adjustments to increase the maximum speed. Severe personal injury and damage to the machine can result if operated at speeds above maximum.
Adjustments to the engine are to be made only by a Lincoln Service Center or an authorized Field Service Shop.
