Honda HSM1590i Manuel De L'utilisateur page 27

Steering lever
Use the steering lever to turn the snowblower.
Squeeze the steering lever on the side to which you want to turn the
snowblower. Note that the radius of turn can be adjusted depending
on a position of the main shift lever and the amount of squeeze of the
steering lever.
To turn to the right: Squeeze the right steering lever.
To turn to the left: Squeeze the left steering lever.
LEFT TURN
STRAIGHT
Reduce speed when making turns. Use extra care when making
turns as the location of the handle and panels relative to the
operator will change suddenly and can cause injury.
Note that the road condition (e.g. asphalt road, covered with snow,
slope, bumpy surface, etc.) can affect the radius of turn and your
steering feel.
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STEERING LEVER
(left)
STEERING LEVER (right)
RIGHT TURN
STRAIGHT