Exmark Commercial 21 4500-686 Rev. B - Manual (Page 34)

Maintenance
8. Reinstall the cover plate and torque the screws to
35-45 ft-lb (47-61 N-m).
9. Install the blade, blade support, and the blade
bolt.
10. Turn the lawn mower upright.
11. Connect the wire to the spark plug.
Waste Disposal
Motor Oil Disposal
Engine oil and hydraulic oil are both pollutants to
the environment. Dispose of used oil at a certified
recycling center or according to your state and local
regulations.
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