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Section 4 - ADJUSTMENTS & REPAIR
WARNING
Before attempting any adjustments or repairs, STOP
the engine, remove the spark plug wire from the
spark plug and secure wire away from plug. Be
extremely careful when performing adjustments around
engine. Engine is extremely hot and can cause severe
burns. Wear heavy leather gloves when handling or
working around cutting blades. Blades are extremely
sharp and can cause severe injury.
4.1 MOWER BLADE REPAIR/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 crank case will saturate the air
filter and cause the engine to hard 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.
4. Sharpen blade on a grinding wheel at an angle of 22
to 28 degrees. DO NOT sharpen blade beyond the
original cutting edge. See Figure 4.3.
FIGURE 4.2
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.
BLADE
HUB
MAKE SURE THAT
BLADE HUB IS
SEATED
BETWEEN
FLANGES
FLANGE
BLADE
CONE WASHER
(Widest Part Up)
CAPSCREW
NEW BLADE
WEAR LIMIT
(NOTCH STARTS)
DANGEROUS CONDITION !
DO NOT USE ON MOWER !
REPLACE WITH NEW BLADE.
NOTE: DO NOT
SHARPEN BEYOND
ORIGINAL
CUTTING EDGE.
22-28º
BLADE TIP
ORIGINAL CUTTING EDGE
END VIEW
OF BLADE