Mower Blades
WARNING: The mower blades are sharp and can cause severe injury. Always protect hands by wearing heavy leather work gloves to grasp blades.
Block |
Of Wood |
Blade |
Figure 29
•Secure the mower blade by putting a piece of wood between the blade and the housing. See Figure 29.
•Remove the hex flange nut that secures the blade to the spindle assembly.
It is extremely important that each cutting blade edge be ground equally to maintain proper blade balance. An unbalanced blade will cause excessive vibration when rotating at high speeds, may cause damage to the unit, or result in personal injury. The blade can be tested by balancing it on a round shaft screwdriver. Grind metal from the heavy side until it balances evenly.
When replacing the blade, be sure to install the blade with the side of the blade marked “Bottom” (or with a part number stamped in it) facing the ground when the mower is in the operating position.
IMPORTANT: Tighten the hex nut that secures mower blade to spindle to 100
WARNING: Periodically inspect the blade adapter for cracks, especially if you strike a foreign object. Replace when necessary.
SECTION 8: TROUBLESHOOTING
Trouble | Possible Cause(s) | Corrective Action |
|
|
|
Engine fails to start | PTO switch engaged. | Disengage PTO switch. |
| Brake pedal not engaged. | Engage brake pedal. |
| Spark plug wire disconnected. | Connect wire to spark plug. |
| Throttle control lever not in correct | Move throttle lever to FAST or START posi- |
| starting position. | tion. |
| Fuel tank empty, or stale fuel. | Fill tank with clean, fresh (not over 30 days) |
|
| gasoline. |
| Blocked fuel line. | Clean fuel line. |
| Faulty spark plug. | Clean, adjust gap or replace. |
| Engine flooded. | Crank engine with throttle in FAST position. |
Engine runs erratic | Unit running in START position. | Move throttle lever to FAST position. |
| Choke lever toward ON position. | Push choke lever to OFF position. |
| Spark plug wire loose. | Connect and tighten spark plug wire. |
| Blocked fuel line or stale fuel. | Clean fuel line; fill tank with clean, fresh (not |
|
| over 30 days) gasoline. |
| Vent in gas cap plugged. | Clear vent. |
| Water or dirt in fuel system. | Drain fuel tank. Refill with fresh fuel. |
| Dirty air cleaner. | Clean air cleaner. |
Engine overheats | Engine oil level low. | Fill crankcase with proper oil. |
| Air flow restricted. | Remove blower housing and clean. |
Occasional skip (hesitates) at | Spark plug gap too close. | Adjust gap to .030”. |
high speed |
|
|
Idles poorly | Spark plug fouled, faulty or gap too | Reset gap to .030” or replace spark plug. |
| wide. |
|
| Dirty air cleaner. | Clean air cleaner. |
Excessive vibration | Cutting blade loose or unbalanced. | Tighten blade and adapter. Balance blade. |
| Bent cutting blade. | Replace blade. |
Uneven cut | Wheels not positioned correctly. | Place all four wheels in same height posi- |
|
| tion. |
| Dull blade. | Sharpen or replace blade. |
| Uneven tire pressure. | Equal tire pressure in all four wheels. |
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