To install the blade, place it on the mounting stud and ensure it sits properly against the centering collar to keep it aligned during operation. Next, install the splined washer over the blade until it seats securely. Finally, thread the protective nut on, turning it clockwise (to the right) to tighten, since it has left-hand threads. Once the nut is hand-tight, use the STIHL Scrench to fully secure the assembly.
STIHL Grass Blade, 4-Tooth, Model# 4001 713 3801

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- 4-tooth design quickly shreds matted and dry grass, ferns, reeds, small saplings and brush
- Fits most trimmers and brushcutters
- Reversible 4-blade design can be flipped over for additional cutting performance
- Tough metal construction
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