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7. For Sharpening: File the top side of the blade to maintain its original cutting angle
(Fig. 27A) and inner cutting edge radius (Fig. 27B). The blade will remain balanced
if you remove the same amount of material from both cutting edges.
8. Check the balance of the blade by placing the center hole of the blade over a nail or
screwdriver shank clamped horizontally in a vise (Fig. 28). If either end of the blade
rotates downward, file that end (not the cutting edge). The blade is properly
balanced when neither end drops.
9. Re-install a sharp balanced Exmark blade, the accelerator, the lock washer, and the
blade bolt. The sail of the blade must point toward the top of the lawn mower housing
for proper installation. Torque the blade bolt to 50 ft-lb (68 N-m).
WARNING
POTENTIAL HAZARD
♦ Operating the lawn mower without the accelerator in
place can cause the blade to flex, bend, or break.
WHAT CAN HAPPEN
♦ Thrown objects from a broken blade can result in
serious injury or death to the operator or bystanders.
HOW TO AVOID THE HAZARD
♦ Do not operate the lawn mower without the accelerator.
10. Return the lawn mower to its upright position.
11. Connect the wire to the spark plug.
5.7 Cleaning under the belt cover (Self-Propelled Models Only)
:
1. Stop the engine and wait for all moving parts to stop.
2. Disconnect the wire from the spark plug (Fig 12 & 14).
3. Remove the bolts that secure the belt cover tot eh lawn mower housing (Fig. 29).
4. Lift off the cover and brush out all the debris around the belt area.
5. Install the belt cover.
Figure 27
Cutting Edge Radius
Cuttin
g
An
g
le
G0220
Figure 28
G0221
Figure 29
Belt Cover
G0223