beautypg.com

Poulan PP446 User Manual

Page 15

background image

15

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.

CUTTERS MUST FACE IN

DIRECTION OF ROTATION

Tip of
Bar

Cutter

Drivelink

Cutters

Depth Gauge

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.

Adjusting Pin

Lower

Hole

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:

Keep others away when

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.

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:

Recheck the idle speed

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

service

dealer

or

call

1--800--554--6723.