Honda EU30is Owner's Manual page 52

4. SPARK PLUG SERVICE
RECOMMENDED SPARK PLUG:
BPR6ES (NGK), W20EPR-U (DENSO)
To ensure proper engine operation, the spark plug must be properly gapped
and free of deposits.
1. Open the left side maintenance cover.
2. Loosen the cover screw and remove the spark plug inspection cover.
SPARK PLUG INSPECTION COVER
COVER SCREW
3. Remove the spark plug cap.
4. Clean any dirt from around the spark plug base.
5. Use a spark plug wrench to remove the spark plug.
PLUG WRENCH
HANDLE BAR
SPARK PLUG CAP
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