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Section 4 - ADJUSTMENTS & REPAIR
WARNING
DO NOT attempt any adjustments, maintenance or
service with the engine or blade running. STOP
blade. STOP engine. Remove spark plug wire from
spark plug and secure wire away from spark plug.
Engine and components can be extremely hot. Avoid
burns by allowing engine and components sufficient
time 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
Never use a cutting blade that shows signs of
excessive wear or damage. Refer to Section on
MOWER BLADE REPAIR/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. Refer to Figure 3.2. Check torque
of blade retaining cap screw. Recommended torque
should be 30 to 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