Blade Sharpening - Snapper 7800971-01 Manual Del Operario

Mower Blade Replacement
WARNING
Amputation Hazard
• DO NOT attempt any maintenance, adjustments or
service with engine and blade running.
• STOP engine and blade.
• Disconnect spark plug wire and secure away from spark
plug.
Burn Hazard
• Engine and components are HOT.
• Avoid serious burns, allow sufficient time for all
components to cool.
Laceration Hazard
• Wear heavy leather gloves when handling or working
around cutting blades.
• Blades are extremely sharp and can cause severe
injury.
WARNING
Unsafe Operation Hazard
DO NOT use a cutting blade that shows signs of excessive
wear or damage.
Standard Blade Wear Limit
1. Inspect the blade (Figure 19) frequently for signs of
excessive wear or damage:
• (A) New blade
• (B) Wear limit (notch starts)
• (C) Dangerous condition! Do not use on the mower!
Replace with a new blade.
Ninja Blade Wear Limit
1. Inspect the blade (Figure 20) frequently for signs of
excessive wear or damage:
• (A) New blade
• (B) Wear limit (cracks or notches begin to appear on
tip)
• (C) Dangerous condition! Do not use on the mower!
Replace with a new blade.

Blade Sharpening

1. Disconnect the spark plug wire and secure the end away
from the plug.
2. Tilt the mower up on its rear wheels. Do not tilt the mower
with the spark plug or carburetor down.
NOTICE
Drain the fuel tank before tipping the mower. DO NOT tip
the machine with the carburetor or spark plug down. Oil
from the crankcase will saturate the air filter and cause the
engine to be hard to start or not start at all. If contamination
does occur, the air filter will have to be replaced.
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3. Remove the blade (B, Figure 21).
4. Sharpen the blade on a grinding wheel at an angle of 22
to 28 degrees (B, Figure 22). DO NOT sharpen the blade
beyond the original cutting edge (A).
5. Check blade for balance. If necessary, correct balance by
grinding heavy end of blade.
6. Reinstall blade (B, Figure 21). Note the correct assembly
order:
• (A) Blade hub
• (B) Blade
• (C) Blade flange (facing up)
• (D) Cone washer (concave side up)
• (E) Capscrew
7. Check torque of blade retaining cap screw.
Recommended torque: 40 lb-ft (54 Nm).
Wheel Drive Control Adjustment
WARNING
Amputation Hazard
• DO NOT attempt any maintenance, adjustments or
service with engine and blade running.
• STOP engine and blade.
• Disconnect spark plug wire and secure away from spark
plug.
Burn Hazard
• Engine and components are HOT.
• Avoid serious burns, allow sufficient time for all
components to cool.
1. The wheel drive control is properly adjusted when there
is 1/16" to 1/8" (1.6 - 3.2 mm) clearance (G, Figure 23)
between the inside of the spring hook (E) and the inside
of the clutch cable eye (C) with the wheel drive control
released.
2. To adjust, unhook the upper spring (D) from the cable eye
and rotate the spring in the direction required to extend or
shorten the spring length.
3. Rehook the upper spring to the cable eye and check
clearance. Repeat the procedure if required.
Note: The vinyl spring cover (B) should be kept over the
spring at all times except for adjustments.
4. If the wheel drive control fails to return quickly to the OFF
position when released, check for binding at the cable
holdings located on the side of the right handle. The
upper clip should be located 2" (5 cm) below the upper
knob; the lower clip should be 4" (10 cm) above the lower
knob. The cable should slide freely with the clips installed
at these locations.
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