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• 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 9A.
FIGURE 9
• 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 9A 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 operator 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.
NOTE: An unbalanced blade will cause excessive vibration when rotating at high speeds, may cause damage to the
mower and could break, causing personal injury.
• Test the blade by balancing it on a round shaft screwdriver or a blade balancer. See Figure 9B.
• If the blade is not balanced, remove metal from the heavy side until it balances evenly.
Adjusting Handle Height
Your mower is shipped with the handle in the higher height position. To lower the handle height, proceed as follows.
• Remove the starter rope from the rope guide.
• Remove the upper handle by removing the hand knobs and carriage bolts. Lay the upper handle out of the
way, being careful not to bend or kink the cables.
• Remove the hairpin clips from the weld pins on the handle brackets. Refer to Figure 3 inset. Press out on the
legs of the lower handle. Remove lower handle from the mower.
Blade
Blade Bell
Support
Hex Bolt
Blade
Crankshaft
1. Insert screw driver through hole
2. Blade should be parallel to ground
Screw
Driver
Ground
Blade
A
B
Adapter