Honda Outdoor Motor BF40A Owner's Manual page 82

10. MAINTENANCE
DHAINPLUG
2. Loosen the drain plug cover screw
using a flat blade screwdriver and
remove the drain plug cover.
80
3. Place the drain plug cover as shown
to use it as an oil drain guide. Place a
suitable contaiuer under the guide.
4. Remove the engine oil drain bolt
and washer using a 12 mm wrench
and drain the engine oil.
5. Install a new sealing washer on the
drain bolt and tighten the bolt
securely.
6. Reinstall the drain plug cover.