Section 4 - REPAIR & ADJUSTMENTS
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.
NEW
BLADE
REMOVE BLADE
RETAINING
BOLTS TO
REMOVE BLADE
FIGURE 4.2
4.Sharpen blade on a grinding wheel at an angle of
22to 28 degrees. DO NOT sharpen beyond original cutting edge. See Figure 4.3.
22°To 28°
WEAR LIMIT
(NOTCH STARTS)
END VIEW
OF BLADE
ORIGINAL CUTTING EDGE
DANGEROUS CONDITION!
DO NOT USE ON MOWER!
REPLACE WITH NEW BLADE.
DO NOT SHARPEN BEYOND
ORIGINAL CUTTING EDGE
FIGURE 4.1
2.Replace the blade if it is badly chipped, bent, noticeably out of balance or has cracks or notch in either tip. See Figure 4.1. Replace with new blade.
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.
2.Tilt mower up on its rear wheels. Do not tilt mower with spark plug or carburetor down.
3.Remove blade. See Figure 4.2.
FIGURE 4.3
5.Check blade for balance. If necessary, correct balance by grinding heavy end of blade.
6.Reinstall blade. See Figure 4.2. Check torque of blade retaining bolts. Recommended torque should be
30to 40 ft. lbs.
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