![OSO 21](http://html1.mh-extra.com/html/oso/21/21_operators-manual_1655934012.webp)
O P E R A T O R ’ S M A N U A L
9
the mower speed output. Do not pull the control
bar all the way up on a flat area if you are not
familiar with its drive system.
ii. To de-activate the self-propel system, release the
control lever just far enough until the mower stops
moving. Letting go of the control lever completely
(no hands on the controls) will also make the
mower de-activate the self-drive, and it will also
shut off the blade.
f. To activate the blade rotation, gently pull the control lever
slightly with one hand and with the other hand press the
Blade Start Button. Notice that to be able to start the
blade, you must pull the control lever just slightly.
However, if you keep pulling the control level, you will
engage the self-propel system, so it is important that you
familiarize yourself with this process.
The mower blade rotation can be started with
and without the self-propel system engaged, by
properly controlling the control bar with one
hand and pushing the start bar with the other
Similarly, the self-propel system can be used
without the blade being on, which can be useful
when transporting the mower.
g. To stop the blade rotation, fully let go of the control lever.
You can disengage the self-propel system while keeping
the blade on by releasing the control lever just enough to
slow the self-propel system to a stop, but not so far as to
fully disengage the blade.
Notice that when slowing down the self-propel
speed, if the control level is released too far, the
blade will also stop as well. If this is not the
user’s intention, please practice stopping the
self-propel system while leaving the blade on by
familiarizing yourself with the different
positions of the control lever.
h. If you must use the grass bag for collection, please first
turn off the mower and wait for all moving parts to stop.
Remove the grass plug, lift the grass door, and hang the
bag from the tabs on the mower.