Stihl RMA 370 Instruction Manual page 25

Always check the mounting screw (1)
when replacing the blade.
WARNING
To reduce the risk of blade detachment
and resulting injury, always replace a
damaged mounting screw.
RMA 370
Mowing blade
a
1
Use a caliper gauge to check blade
N
thickness at a minimum of 5
different points.
Place a ruler on the front edge of the
N
blade and measure how far it has
been filed back.
Blade thickness must not be less than
a = 0.06 in (1.6 mm) at any point.
Cutting edges may be filed back no
more than b = 0.2 in (5 mm).
Mulching blade
a
b
Use a caliper gauge to check blade
N
thickness at a minimum of 5
different points.
Place a ruler on the rear edge of the
N
blade and measure how far it has
been filed back.
Blade thickness must not be less than
a = 0.06 in (1.6 mm) at any point.
Blade width at the cutting edges must be
a minimum of b = 0.87 in (22 mm).
English
b
b
23