Honda Harmony HRM215SXA Owner's Manual page 59

Drive Clutch Cable Adjustment (SXA)
Measure free play at the top of the lever, as shown. Free play should
be 3/l 6 - 318 in (5 - 10 mm). If adjustment is necessary:
1. Loosen the lock nuts with a 10 mm wrench, and move the adjuster
up or down as required.
2. Tighten the lock nuts and recheck free play.
3. Start the engine outdoors, and operate the drive clutch lever.
Check that the drive clutch engages and releases properly.
If the drive clutch does not operate as it should, with correct cable
adjustment, take the mower to an authorized Honda servicing
dealer for repair.
3116 - 3l8 in
(5 - 10 mm)
DRIGE CLUTCH
LEVER
57