Duramaxx 84881 Owner's Manual page 22

MAINTENANCE
BALANCING THE BLADE (Fig. 11)
When sharpening, care should be taken to keep the blade balanced. An unbalanced blade
will cause excessive vibra-tion when the mower is running. This vibration will eventually
cause damage to the mower, especially the motor.
To check the blade balance:
■ Clamp a screwdriver horizontally in a vise as shown.
NOTE: If a vise is not available, a straight nail can also be used.
■ Place the center hole of blade on the screwdriver (or nail) shank.
■ If blade is balanced, it will remain in a horizontal position. If either end of the blade drops
downward, sharpen the heavy side until the blade is balanced.
Fig. 11
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