Spark Plug Service - Honda EW171 Owner's Manual

Spark Plug Service
In order to service the spark plug, you will need a spark plug wrench
(commercially available).
Recommended spark plugs: BPR5ES (NGK)
To ensure proper engine operation, the spark plug must be properly gapped
and free of deposits.
W1 GEPR-U (DENSO)
If the engine has been running, the muffler will be very hot. Be Careful not to
touch the muffler.
1. Remove the spark plug cap.
2. Clean any dirt from around the spark plug base.
3. Use a spark, plug wrench to remove the spark plug.
PLUG WRENCH
PLUG CAP
4. Visually inspect the spark plug. Discard it 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 carefully bending the side electrode.
The gap should be: 0.028-0.031 in (8.70-0.80 mm)
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