Maintenance, Cleaning Fuel Sediment Cup, See Figure

MAINTENANCE

CLEANING FUEL SEDIMENT CUP

See Figure 13.

The sediment cup prevents dirt and water that may have gotten into the fuel tank from entering the carburetor. If the engine has not been run for a long time, the sediment cup should be cleaned before use.

Turn the fuel valve to the OFF position.

Remove the sediment cup using a 10 mm wrench (not provided).

Remove the O-ring and filter.

Clean each of the parts in carburetor cleaner or any comparable cleaning product.

Reinstall the filter, O-ring, and sediment cup. Tighten with wrench to secure.

Return the fuel valve to ON position and check for leaks.

SPARK PLUG MAINTENANCE

See Figure 14.

The spark plug must be properly gapped and free of deposits in order to ensure proper engine operation. To check:

Remove the spark plug cap.

Clean any dirt from around base of spark plug.

Remove spark plug using wrench provided.

Inspect spark plug for damage, and clean with a wire brush before reinstalling. If insulator is cracked or chipped, spark plug should be replaced.

NOTE: If replacing, use the following recommended

spark plugs or equivalent: Champion RN9YC or NGK BPR5ES.

Measure plug gap. The correct gap is 0.028−0.031 in. (0.7-0.8 mm). To widen gap, if necessary, carefully bend the ground (top) electrode. To lessen gap, gently tap ground electrode on a hard surface.

Seat spark plug in position; thread in by hand to prevent cross-threading.

Tighten with wrench to compress washer. If spark plug is new, use 1/2 turn to compress washer appropriate amount. If reusing old spark plug, use 1/8 to 1/4 turn for proper washer compression.

NOTE: An improperly tightened spark plug will become very hot and could damage the engine.

FUEL

VALVE