Honda F401 Owner's Manual page 19

3. Ciean sediment cup
Turn the fuel valve to the off position and remove the sediment cup and
O-ring.
Wash removed parts in solvent, dry them thoroughly and reinstall them
securely. Turn the fuel valve ON and check for leaks.
4. Spark plug service
Recommended spark plug: BPR5ES (NGK)
WlGEPR-U (ND)
To ensure proper engine operation, the spark plug must be properly gapped
and free of deposits.
1. Remove the spark plug cap.
B if the engine has been running, the muffler will be very hot. Be
care;ful not to touch the muffler.
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