Poulan Pro PR48BT Manuel D'instructions page 16

Air is released as soon as the engine is started, even
when idling. Do not allow anyone to stand close to the
blower or the blower tube.
3
2
1
1 Full throttle
2 Idle speed
3 Stop switch
Stopping
The engine is stopped by moving the stop switch to the
stop position.
16 – English
STARTING AND STOPPING