Section 4 - REPAIR & ADJUSTMENTS
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 REPAIR/REPLACEMENT 4.1.1. STANDARD BLADE WEAR LIMIT
1.Inspect blade frequently for signs of excessive wear or damage. See Figure 4.1.
NEW
BLADENOTCH OR CRACK IN TIP - REPLACE BLADE
WEAR
LIMIT
DEEP NOTCH
IN TIP
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.
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. Do not tilt mower with spark plug or carburetor down.
3.Remove blade. See Figure 4.3.
DANGEROUS ! DO NOT USE A
BLADE IN THIS CONDITION !
FIGURE 4.1
4.1.1A. NINJA BLADE WEAR LIMIT
1A. Inspect blade frequently for signs of excessive wear or damage. See Figure 4.2.
NEW | WEAR LIMIT | |
CRACKS OR | ||
BLADE | ||
NOTCHES BEGIN TO | ||
| ||
| APPEAR ON TIP |
MAKE SURE THAT
BLADE HUB IS
BLADE HUB SEATED BETWEEN FLANGES
FLANGE
BLADE
CONE WASHER (Concave Side Up)
CAPSCREW
FIGURE 4.3
REPLACE
BLADE
DANGEROUS ! DO
NOT USE A BLADE IN
THIS CONDITION !
FIGURE 4.2
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