Poulan Pro SM446E Instruction Manual page 15

Replace the old chain when it becomes worn or
damaged. Use only the Low-Kickback replace-
ment chain specified in the repair parts list.
TO REPLACE CHAIN:
1. Move ON/OFF switch to the OFF position
and disconnect spark plug.
2. Remove bar clamp nut.
3. Remove bar clamp.
4. Turn adjusting screw by hand counter-
clockwise until adjusting pin just touches
the stop.
5. Slide guide bar behind sprocket until
guide bar stops against sprocket.
6. Remove the old chain.
7. Carefully remove new chain from pack-
age. Hold chain with the drive links as
shown.
Cutter
Tip of
Bar
Drivelink
CUTTERS MUST FACE IN
DIRECTION OF ROTATION
Cutters
Drive Links
8. Place chain over sprocket, fitting the
drive links in the sprocket.
9. Fit bottom of drive links between the teeth
in the sprocket in the nose of the guide
bar.
10. Fit chain drive links into bar groove.
11. Pull guide bar forward until chain is snug
in guide bar groove. Ensure all drive links
are in the bar groove.
12. Now, install bar clamp making sure the
adjusting pin is positioned in the lower
hole in the guide bar.
Guide Bar
13. Install bar clamp nut and finger tighten
only. Do not tighten any further at this
point. Proceed to the CHAIN ADJUST-
MENT section.
CHAIN ADJUSTMENT
See CHECK CHAIN TENSION in MAINTE-
NANCE section.
CARBURETOR ADJUSTMENT
WARNING:
making idle speed adjustments. The chain
will be moving during most of this procedure.
Wear your protective equipment and observe
all safety precautions. After making adjust-
ments, the chain must not move at idle speed.
The carburetor has been carefully set at the
factory. Adjustment to the idle speed may be
necessary if you notice any of the following
conditions:
S Engine will not idle when the throttle is re-
leased.
Depth Gauge
S The chain moves at idle.
Make adjustments with the unit supported so
the pruner is off the ground and the chain will
not make contact with any object. Hold the
unit by hand while running and making adjust-
ments. Keep all parts of your body away from
the chain and muffler.
Idle Speed Screw
IDLE SPEED ADJUSTMENT
Allow engine to idle. Adjust idle speed until en-
gine runs without chain moving (idle too fast)
or stalling (idle speed too slow).
S Turn idle speed screw clockwise to in-
crease engine speed if engine stalls or dies.
S Turn idle speed screw counterclockwise to
decrease engine speed if chain moves at idle.
WARNING:
after each adjustment. The chain must not
move at idle speed to avoid serious injury to
the operator or others.
If you require further assistance or are unsure
about performing this procedure, contact your
authorized
1- -800- -554- -6723.
15
Lower
Hole
Adjusting Pin
Keep others away when
Recheck the idle speed
service dealer or call