Honda HRM300/500 Owner's Manual page 55

Checking the blades and blade disc
N WARNING
- Do not touch the blades with your hands.
NOTE:
- Hold the lawnmower against a wall for support.
- Do not lift the lawnmower off of the ground while checking it.
Check the blades and blade disc for problems.
Check item(s)
Damage to the blades
Blades
Loosened bases of the
blades
Blade disc Warping of the blade disc
Normal
Base of
the blade
Visually inspect the blades.
If they are damaged, replace the blades (M page
55).
Rotate the bolts with your finger to check that
they are not loose.
If the bolts are loose, tighten them to the
specified torque value. See "Blade replacement"
— "Installation" (M page 55).
Rotate the blade disc and visually check it.
If it is warped, consult your dealer
Damaged blades
Excessively worn Cracked
Cleaning and checking
Action
Bent
Blade disc
53