7
BLADE SHARPENING
Sharpen the blades when grass tends to stick to them.
WARNING
Stop the engine before sharpening the blades.Wear
gloves to help prevent injury.
Blade sharpening
1. First remove the upper and lower blades.
(See pages 9 through 11 for removal and installation)
2. Sharpen the edge of the both upper and lower blades.
(See illustration) with a file.
-Take care not to heat the blade enough to change the
color. This may decrease blade hardness.
- Sharpen the blade edge at 45 degrees.
Side view
Sharpen the blade edge
Timing for Blade Replacement and Blade Sharpening
1. It is suggested to sharpen the blades in every 8 to 10 hours
of operation as a reference in case of cutting soft grasses or
lawn.
2. It is also suggested to replace the blades in every 30 to 40
hours of operation including 3 to 4 times of blade sharpening.
3. Replace the blades if either upper or lower blade thickness
has been worn to 2.7mm or less.
Blade thickness
Blade thickness (common to
the upper and lower blade)
-Referenced operating hours for blade sharpening differs
depending on the type grasses, or cutting environments
including obstacles like soil and sand.
- Some grasses could be rolled up in the blades. If this
happens, first remove the blades then remove completely
the rolled grasses, as it could seriously affect the life of
blades and main body.
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