Honda HT3810 Owner's Manual page 26

3. If either of the blades shows signs of damage or excessive wear,
remove the cutter deck, and thoroughly inspect the blades (see cutter
deck removal instructions on page 37). Dull blades can be sharpened,
but blades that are worn out, bent, cracked, or otherwise damaged
must be replaced. If the blades need sharpening or replacement, take
the cutter deck to your authorized Honda lawn tractor dealer. Or, if you
have the proper tools, you can remove and install the blades yourself
(see blade removal and installation instructions on pages 51-52).
J=e3 BENT
FEZi CRACKED
Severe personal injury can result if a piece of blade breaks off and is
thrown from under the cutter deck.
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Never operate the lawn tractor with a worn or damaged blade.
l
Never operate the lawn tractor with a blade that is cracked or notched
at the base of its upturned rear edge.
CAUTION:
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Use a genuine Honda replacement blade, or equivalent.
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To reduce the possibility of weakening the blade, or causing imbalance
or poor cutting performance, sharpening should be performed by an'
authorized Honda lawn tractor dealer.
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