Cleaning The Under The Belt Cover - Exmark Metro 21 Operator's Manual

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7. For Sharpening: File the top side of the blade to maintain its original cutting angle
8. Check the balance of the blade by placing the center hole of the blade over a nail or
9. For Installation: Make sure to grasp the end of the blade using a rag or a thickly
10. Return the lawn mower to its upright position.
11. Connect the wire to the spark plug.
4.7 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 4 & 6).
3. Remove the bolts that secure the belt cover to the lawn mower housing (Fig. 24).
(Fig. 22A) and inner cutting edge radius (Fig. 22B). The blade will remain balanced
if you remove the same amount of material from both cutting edges.
Cutting Angle
screwdriver shank clamped horizontally in a vise (Fig. 23). If either end of the blade
rotates downward, file that end (not the cutting edge). The blade is properly
balanced when neither end drops.
padded glove.
For Blade Brake Clutch Units: Install a sharp, balanced Exmark blade, the
accelerator, the anti-scalp cup, and the blade nuts. The sail of the blade must point
toward the top of the lawn mower housing for proper installation. Torque the blade
nuts to 15-27 ft-lb (20-37 N m).
For Units without a Blade Brake Clutch: Install a sharp, balanced Exmark blade, the
accelerator, and blade bolt. The sail of the blade must point toward the top of the
lawn mower housing for proper installation. Torque the blade nuts to 50 ft-lb
(68 N m).
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.
Belt Cover
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Cutting Edge Radius
Figure 22
G0221
Figure 23
WARNING
G0223
Figure 24
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G0220