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

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.

Lower

Hole

Adjusting Pin

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:

SEngine will not idle when the throttle is re-

leased.

SThe 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 runningand making adjust- ments. Keep all parts of your body away from the chain and muffler.

Idle Speed Screw

IDLE SPEED ADJUSTMENT

Allow engineto 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 speedif 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.

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Poulan PP446, 530164083 instruction manual To Replace Chain, Chain Adjustment, Carburetor Adjustment, Idle Speed Adjustment

PP446, 530164083 specifications

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