Stihl SP 451 Instruction Manual page 13

Symbol on slide control
7 h – stop symbol and arrow. To stop
the engine, push the slide control in
the direction of the arrow on the stop
symbol (h) to STOP-0.
Starting
N Press down the trigger lockout lever
and squeeze the throttle trigger.
N Hold both levers in this position.
N Move the slide control to START
and hold it there.
N
Now release the throttle trigger,
slide control and trigger lockout in
that order. This is the starting
throttle position.
9
8
N Set the choke knob (8):
g If the engine is cold
e for warm start – also use this posi-
tion if the engine has been running
but is still cold.
N Press the fuel pump bulb (9) at least
five times – even if the bulb is
already filled with fuel.
SP 451, SP 481
10
N Press in the decompression valve
button (10) before each starting
attempt.
Cranking
N Place the unit on the ground: It must
rest on the guard plate on the
underside of the powerhead and the
machine support under the front
handle. Check that the hook is not
touching the ground of any other
obstacles.
N Make sure you have a firm footing.
N Hold the unit with your left hand and
press it down firmly.
N Pull the starter grip slowly with your
right hand until you feel it engage
and then give it a brisk strong pull.
Do not pull out the starter rope all
the way – it might otherwise
break.
N Do not let the starter grip snap back.
Guide it slowly back into the housing
so that the starter rope can rewind
properly.
N Continue cranking until engine fires.
When the engine begins to fire:
N Turn the choke knob to e.
N
Press in button to open the
decompression valve.
N Continue cranking until the engine
runs.
English
11