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 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
WEAR LIMIT (NOTCH STARTS)
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 & 4.1A. 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: Drain fuel before tipping mower. 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.
DANGEROUS CONDITION ! DO NOT USE ON MOWER ! REPLACE WITH NEW BLADE.
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.
BLADE
HUB
FIGURE 4.1
4.1.1.A. NINJA BLADE WEAR LIMIT | FLANGE |
1.Inspect blade frequently for signs of excessive wear or damage. See Figure 4.2.
MAKE SURE THAT BLADE HUB IS SEATED BETWEEN FLANGES
NEW BLADE | WEAR LIMIT. |
| |
CRACKS OR | BLADE | ||
| |||
| NOTCHES | ||
|
| ||
| BEGIN TO |
| |
| APPEAR ON TIP | CONE WASHER | |
|
| ||
|
| (Concave Side Up) | |
|
| CAPSCREW | |
|
| FIGURE 4.3 | |
| DANGEROUS ! |
| |
| DO NOT USE A BLADE IN |
| |
| THIS CONDITION ! |
| |
|
|
| |
| FIGURE 4.2 |
|
11
