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14
SECTION 10: SERVICE & ADJUSTMENTS
Blade Care
Periodically inspect the blade adapter for cracks, especially if you strike a foreign object. Replace when necessary.
WARNING: When removing the cutting blade for sharpening or replacement, protect hands by
using heavy gloves or a rag to grasp the cutting blade.
• Disconnect spark plug wire from spark plug.
• Turn mower on its side making sure that the air filter and the carburetor are up.
To Remove Blade
• Remove the bolt and blade bell support which hold the blade and adapter to the engine crankshaft. See
Figure 11A.
• Remove the blade and adapter from the crankshaft.
To Replace Blade:
• Before reinstalling the blade and the blade adapter to the unit, lubricate the engine crankshaft and the inner
surface of the blade adapter with light oil.
• Install the blade adapter on the crankshaft with the “star” away from the engine. See Figure 11A.
FIGURE 11
• Place the new blade with the side marked bottom (or with part number) facing away from the adapter.
• Place the bell support next. Make sure to align the tabs in the holes of the blade with the hole in the bell
support.
• Insert the hex bolt through the blade assembly. Figure 11A shows the correct order of assembly.
• Use block of wood to hold blade again while you tighten the bolt clockwise. Follow the recommended torque
for the bolt which is 450-600 in.-lbs.
IMPORTANT: The bolt, used to secure the blade to the engine, is specially heat-treated. Do not substitute. To order
replacement bolt, refer to the Parts List section of this manual.
WARNING: To ensure safe operation of your unit, all nuts and bolts must be checked periodically
for correct tightness.
To Sharpen Blade:
• The blade can be sharpened with a file or on a grinding wheel. Do not attempt to sharpen while blade is on
the mower.
• Follow the original angle of grind as a guide. Make sure that each cutting edge receives an equal amount of
grinding to prevent an unbalanced blade.
Blade Adapter
Blade Bell
Support
Hex Bolt
Single-Bolt
Blade
Crankshaft
1. Insert screw driver through hole
2. Blade should be parallel to ground
Screw
Driver
Ground
Blade
A
B