Honda Power Products HSS970 Manuel De L'utilisateur page 27

Transmission release lever
The transmission release lever has to positions, RELEASED and
ENGAGED. Set the lever in the ENGAGED position when blowing
snow; set it in the RELEASED when pushing the snowblower.
Never shift the transmission release lever on slopes. The snow
throwing mechanism may operate suddenly, causing serious injury or
accident.
1. Stop the engine.
2. Set the shift lever in the ''N'' (Neutral) position.
3. Set the lever in the ENGAGED or RELEASED position.
Operating the transmission release lever while the engine is running
can damage the transmission.
TRANSMISSION RELEASE LEVER
Towing or pushing the snowblower with another vehicle will damage
the transmission.
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R R E E L L E E A A S S E E D D E E N N G G A A G G E E D D
RELEASED
ENGAGED