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Section 4 - ADJUSTMENTS & REPAIR
WARNING
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. Engine and components are
HOT. Avoid serious burns, allow sufficient time for
all components to cool. Wear heavy leather gloves
when handling or working around cutting blades.
Blades are extremely sharp and can cause severe
injury.
4.1 MOWER BLADE REPLACEMENT
4.1.1. STANDARD BLADE WEAR LIMIT
1. Inspect blade frequently for signs of excessive
wear or damage. See Figure 4.1.
NEW BLADE
FIGURE 4.1
WARNING
DO NOT use a cutting blade that shows signs of
excessive wear or damage. Refer to Section
"MOWER BLADE REPLACEMENT" for proper blade
inspection and service procedures.
4.1.2. BLADE SHARPENING
1. Disconnect spark plug wire and secure end away
from plug.
IMPORTANT: DO NOT tip machine with carburetor or
spark plug down. Oil from 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.
2. Tilt mower up on its rear wheels.
3. Remove blade. See Figure 4.2.
WEAR LIMIT
(NOTCH STARTS)
DANGEROUS CONDITION !
DO NOT USE ON MOWER !
REPLACE WITH NEW BLADE.
BLADE
REMOVE BLADE
RETAINING SCREW
4. Sharpen blade on a grinding wheel at an angle of
22 to 28 degrees. DO NOT sharpen blade beyond
original cutting edge. See Figure 4.3.
NOTE: DO NOT
SHARPEN BEYOND
ORIGINAL
CUTTING EDGE.
5. Check blade for balance. If necessary, correct
balance by grinding heavy end of blade.
6. Reinstall blade. See Figure 3.2. Check torque of
blade retaining cap screw. Recommended torque
should be 30 to 40 ft. lbs.
13
FIGURE 4.2
22-28º
BLADE TIP
END
VIEW OF
ORIGINAL
BLADE
CUTTING EDGE
FIGURE 4.3
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