Honda HRC216HXA Owner's Manual page 22

OPERATION
Drive Clutch Lever
Push the drive clutch lever
forward to propel the mower.
Release the drive clutch lever to
stop the mower's forward
movement.
DRIVE CLUTCH LEVER
You can control self-propelled speed with the drive clutch lever. The
mower will move gradually faster as you push the drive clutch lever
forward. If you push the lever all the way forward to the handlebar, the
mower will move at the speed determined by the shift lever setting
(page 21).
When moving and using the drive clutch lever to change self-propelled
speed, continue to fully hold the blade control lever against the
handlebar. This will help prevent damage to the blade control
mechanism. Use the shift lever (page 21) to change the maximum
speed so you can hold the drive clutch lever comfortably against the
handlebar.
For self-propelled mowing, press the button on top of the blade control
lever, push the blade control lever forward, then push the drive clutch
lever forward. The drive clutch lever can be used to hold the blade
control lever against the handlebar.
Always release the drive clutch lever before starting the engine. If the
drive clutch is engaged, the mower will move forward when you
operate the starter.
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