8. Maintenance
MA2
MA3
MA4
MA5
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
NOTE
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
NOTE
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
WARNING
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.
