Honda Harmony H2013HDA Owner's Manual page 89

MAINTENANCE
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Blade Sharpening
A dull blade may be sharpened, but a blade that is worn out, bent,
cracked, or otherwise damaged must be replaced. Always use a
genuine Honda replacement blade or high-quality equivalent.
SHARPENING GUIDELINES
Maintain the original angle of the
blade (about 30').
Sharpen the blades to a knife edge.
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Remove an equal amount of material from each end of the blade
to maintain balance.
Do not remove material from the inner area of the
cutting edge. If you need to remove material to
restore the cutting edge, taper the edge toward the
tip. Do not taper beyond l/3 of the blade width.
Do not grind the back side of the blade
through the center hole. Should one end of the
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Check the balance of the blade by placing a dowel
blade drop, remove additional material from that end
of the blade to achieve balance.
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