Honda BF40D Owner's Manual page 90

STORAGE
WATER INTAKES
WATER INTAKES
88
7. Allow the engine to run at idle for
at least 5 minutes to clean the
inside of the motor.
8. Stop the motor and remove the
garden hose adapter.
9. Remove the sealing washer from
the garden hose adapter and install
the sealing washer on the wash
screw.
If tape was used to cover the three
water intakes in step 6, remove the
tape now.
10. Install the wash screw into the gear
case securely.