Honda HS1810Z Owner's Manual page 23

Parking brake lever
Operate the parking brake lever when parking the snowblower. First,
pull the parking brake lever in the ''PARKING'' position. The side clutch
levers are locked and the transmission is locked.
Be sure to set the parking brake lever in the ''PARKING'' position
whenever parking the snowblower.
R R U U N N N N
PARKING BRAKE LEVER
Do not operate the parking brake lever while running. It can adversely
affect the transmission.
If you need to park on a slope, set the parking brake lever in the
''PARKING'' position and shift lever in the ''NEUTRAL'' position of the
''LOW SPEED'' range.
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I I N N G G
P P A A R R K K I I N N G G
PARKING