6.Reinstall the oil filler cap/dipstick securely.

CAUTION! Thoroughly wash your hands with soap and water as soon as possible after handling

used oil.

NOTE: Please dispose of used motor oil in a manner that is friendly to the environment. Take it to a recyling center or other collection center.

Spark Plug

WARNING! DO NOT check for a spark with the spark plug removed. DO NOT crank the engine with the spark plug removed.

WARNING! If the engine has been running, the muffler will be very hot. Be careful not to touch the muffler.

To ensure proper engine operation, the spark plug must be properly gapped and free of deposits.

1.Remove the spark plug boot and use a spark plug wrench to remove the plug, Fig. 7-3.

Spark Plug

Spark Plug Boot

Figure 7-3

2.Visually inspect the spark plug. Discard the spark plug if there is any apparent wear, or if the insulator is cracked or chipped. Clean the spark plug with a wire brush if it is to be reused.

3.Measure the plug gap with a feeler gauge. Correct as necessary by bending the side electrode, Fig. 7-4. The gap should be set to .02-.03 inches (0.60-0.80 mm).

Electrode

.02-.03 in.

(0.60-0.80 mm)

Figure 7-4

4.Check that the spark plug washer is in good condition and thread the spark plug in by hand to prevent cross- threading.

5.After the spark plug is seated, tighten with a spark plug wrench to compress the washer.

NOTE: When installing a new spark plug, tighten 1⁄2-turn after the spark plug seats to compress the washer. When reinstalling a used spark plug, tighten 1⁄8- to 1⁄4-turn after the spark plug seats to compress the washer.

caution! The spark plug must be tightened securely. A loose spark plug can become very hot and can damage the engine.

Cleaning the Engine

If the engine has been running, allow it to cool for at least a half an hour before cleaning. Periodically remove dirt build-up from engine.

CAUTION! Do not spray the engine with water to clean it because the water could contaminate the fuel. Using a garden hose or pressure washing equipment can also force water into the muffler opening. Water that passes through the muffler can enter the cylinder and cause damage.

WARNING! Accumulation of debris around the muffler could cause a fire. Inspect and clean before every use.

Section 7 — Engine Maintenance

 

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