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8. Maintenance
To Sharpen Blade:
1. When the corners of cutter become rounded and
the cutting edges become dull, resharpen using
a small disk grinder, etc. (MA2)
2. When sharpening, offset the top and bottom
blade teeth by 1/8 inches (3.125mm), as shown
in the illustration. (MA3)
(1) Offset
(2) Top blade
(3) Bottom blade
Apply the grinder lightly and quickly. Pressing too
strongly or grinding for too long will generate heat
which can soften the temper of the blade and
accelerate wear.
3. The width of cutter decreases with repeated use
and resharpening. Replace with a new blade
when the width at the end becomes less than
5/16 in (7.75mm). (MA4)
(1) New blade
(2) Worn out blade
Using a worn blade can cause chipping of cutters,
resulting in a loss of operation time and shorter
service life of the machine.
To Rotate Blade By Hand: (MA5)
When resharpening an old blade or replacing with
a new blade, insert the accessory hex wrench into
the hex hole in the top of the crankcase and turn
strongly 2~3 times. This removes burrs and uneven
painting from the blade and makes starting easier.
(1) Turn
(2) Hex wrench
Never perform this operation while the engine
is running because this is extremely
dangerous. Always stop the engine before
inspecting the blade for any reason.
WARNING
NOTE
NOTE
MA2
MA3
MA4
MA5