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INSPECTING/CLEANING THE SPARK ARRESTOR

Inspect and clean the spark arrestor every 100 hours of

operation (refer to Table 4). The spark arrestor is located

outside the mufﬂer, which gets very hot during operation.

Allow the engine to cool completely before servicing the

spark arrestor.

1. Remove the two bolts that secure the spark arrestor to

the mufﬂer. See Fig. 14.

2. Remove the spark arrestor screen.

3. Carefully clean and remove the carbon deposits from the

spark arrestor screen with a wire brush. Replace the spark

arrestor if it is damaged. Replacement spark arrestors can

be purchased from wenproducts.com.

4. Reinstall the spark arrestor in the mufﬂer and secure it in

place with the screws.

SPARK PLUG MAINTENANCE

Inspect and change the spark plug every 100 hours of operation (refer to Table 4). The spark plug is important

for proper engine operation. Check the spark plug regularly to maintain proper engine operation. A good spark plug

should be intact, free of deposits, and properly gapped.

1. Gently pull on the spark plug boot to remove it. Be careful not to tear insulation or wire.

2. Use the included spark plug wrench (slide the handle into the hole on the wrench) to unscrew the spark plug from

the engine. Remove the spark plug from the engine. TIP: There is limited space for the wrench to turn. Use both

rows of holes in the spark plug wrench to gain leverage to loosen the plug.

3. Visually inspect the spark plug. If it is cracked or chipped, or if the electrodes are worn or burned, discard it and

replace with a new spark plug. We recommend replacing it with an F6RTC spark plug. These can be purchased from

wenproducts.com.

4. If re-using the spark plug, use a wire brush to clean any dirt from around the spark plug base, then re-gap the

spark plug.

Instructions continue on the next page.

MAINTENANCE

Spark Arrestor

Fig. 14

Wen GN875i User Manual

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