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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.
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.
FIGURE 4.2
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.
FIGURE 4.3
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 40 ft. lbs.
WEAR LIMIT
(NOTCH STARTS)
DANGEROUS CONDITION !
DO NOT USE ON MOWER !
REPLACE WITH NEW
BLADE.
NEW BLADE
BLADE
REMOVE BLADE
RETAINING
SCREW
BLADE TIP
ORIGINAL
CUTTING EDGE
NOTE: DO NOT
SHARPEN BEYOND
ORIGINAL
CUTTING EDGE.
22-28º
END
VIEW OF
BLADE