Honda Harmony HRB217TDA Owner's Manual page 32

SERVICING YOUR LAWN MOWER
Blade Removal and Installation
If you remove the blades for sharpening or replacement, you will need
a torque wrench for installation. Wear heavy gloves to protect your
hands.
BLADE SHARPENING: To avoid weakening the blades, or causing
imbalance or poor cutting, the blades should be sharpened by trained
staff at an authorized Honda servicing dealer.
BLADE REPLACEMENT: Use genuine Honda replacement blades or
their equivalent (page 65).
Blade Removal
1. Turn the fuel valve OFF. Disconnect the spark plug cap, then tilt
the mower to the right side, so the carburetor side is up. This will
help to prevent fuel leakage and hard starting due to carburetor
flooding.
2. Remove the two blade bolts with a 14 mm socket wrench. Use a
wooden block to prevent the blades from turning when removing
the bolts. Remove the blades.
UPPER BLADE
BLADE BOLT (2)
SPECIAL WASHER (2)
30
LOWER BLADE