Spark Arrester Maintenance; Fuel Filter Maintenance - Benchmark BW4400 Mode D'emploi

1. Remove the spark plug cap.
2. Remove the spark plug with the spark plug wrench.
3. Visually inspect the spark plug. Replace with a new plug if the insulation is
cracked or chipped. Clean with a wire brush if the spark plug is reused.
4. Measure the spark plug gap with a feeler gauge. The normal value is:
0.7-0.8mm (0.028- 0.031in). Adjust the gap by carefully bending the electrode.
5. Carefully reinstall the spark plug by hand, to avoid cross-threading. A new
spark plug should be tightened 1/2 turn with a spanner. A used spark plug
should be tightened 1/8 to 1/4 turn with spanner.
6. Reinstall the spark plug cap.
Note
The spark plug must be securely tightened or it could cause the spark
plug to heat up, enough to damage the engine.
Never use a spark plug with an improper heat range.

6.8 SPARK ARRESTER MAINTENANCE

1. After the engine has cooled down remove the bolts securing the muffler
cover to the muffler.
2. Use a brush to remove carbon deposits from the spark arrester.

6.9 FUEL FILTER MAINTENANCE

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1. Remove the fuel cap and filter.
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2. Clean the filter with solvent.
3. Wipe the filter.
4. Reinsert the filter.
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