Honda BF75D Owner's Manual page 132

CONNECTOR
LOCK TAB
6 × 25mm
FLANGE BOLT
4. Remove the 6 × 25 mm flange bolt.
Disconnect the connector by
pushing the lock tab and remove
the ignition coil.
IGNITION
COIL
PLUG WRENCH
5. Remove the spark plug using the
plug wrench, box wrench and the
screwdriver (accessories).
BOX WRENCH
6. Inspect the spark plugs.
MAINTENANCE
New plug Plug needing
replacement
(1) If the electrodes are heavily
corroded or carbon-soiled,
clean with a wire brush.
(2) Replace a spark plug if the
central electrode is worn.
The spark plug can wear out in
different ways.
If the sealing washer shows
signs of wear, or if the
insulators are cracked or
chipped, replace the spark
plugs.
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