Warning – Poulan PP4620AVHD User Manual

Page 15

Outlet Cover

Exhaust Outlets

Exhaust Outlets must face

chain brake (bar side) of chain saw

9. Inspect the muffler gasket and replace if

damaged.

10. Reinstall backplates, muffler gasket and

muffler using muffler bolts. TIghten until

secure.

11. Reinstall bolt cover and locknut.

12. Reinstall the spark plug boot.

13. Reinstall the cylinder cover and 3

screws. Tighten securely.

CARBURETOR ADJUSTMENTS

WARNING:

The chain will be mov-

ing during most of this procedure. Wear your

protective equipment and observe all safety

precautions. The chain must not move at idle

speed.
The carburetor has been carefully set at the

factory. Adjustments may be necessary if

you notice any of the following conditions:
S

Chain moves at idle. See IDLE SPEED--T

adjusting procedure.

Saw will not idle. See IDLE SPEED--T ad-

justing procedure.

Idle Speed--T

Allow engine to idle. If the chain moves, idle

is too fast. If the engine stalls, idle is too slow.

Adjust speed until engine runs without chain

movement (idle too fast) or stalling (idle too

slow).
S

Turn idle speed screw (T) clockwise to in-

crease engine speed.

Turn idle speed screw (T) counterclock-

wise to decrease engine speed.

If you require further assistance or are unsure

about performing this procedure, contact your

authorized

service

dealer

call

1--800--554--6723.

BAR MAINTENANCE

If your saw cuts to one side, has to be forced

through the cut, or been run with an improper

amount of bar lubrication it may be neces-

sary to service your bar. A worn bar will dam-

age your chain and make cutting difficult.
After each use, ensure ON/STOP switch is

in the STOP position, then clean all sawdust

from the guide bar and sprocket hole.
To maintain guide bar:
S

Move ON/STOP switch to the STOP posi-

tion.

Loosen and remove chain brake nuts and

chain brake. Remove bar and chain from

saw.

Clean the oil holes and bar groove after each

5 hours of operation.

Remove Sawdust From

Guide Bar Groove

Oil Holes

Burring of guide bar rails is a normal

process of rail wear. Remove these burrs

with a flat file.

When rail top is uneven, use a flat file to re-

store square edges and sides.

Correct Groove

Worn Groove

File Rail Edges

and Sides

Square

Replace guide bar when the groove is worn,

the guide bar is bent or cracked, or when

excess heating or burring of the rails occurs.

If replacement is necessary, use only the guide

bar specified for your saw in the repair parts list

or on the decal located on the chain saw.

CHAIN SHARPENING

Chain sharpening is a complicated task that

requires special tools. We recommended

you refer chain sharpening to a professional

chain sharpener.

IGNITION TIMING

Ignition timing is fixed and nonadjustable.

SPARK PLUG

The spark plug should be replaced each

year to ensure the engine starts easier and

runs better.

1. Loosen 3 screws on cylinder cover.

2. Remove the cylinder cover.

3. Pull off the spark plug boot.

4. Remove spark plug from cylinder and

discard.

5. Replace with Champion RCJ--7Y spark

plug and tighten with a 3/4 inch socket

wrench. Tighten securely. Spark plug

gap should be 0.025 inches.

6. Reinstall the spark plug boot.

7. Reinstall the cylinder cover and 3 screws

Tighten securely.

Spark Plug Boot

STORAGE

WARNING:

Stop engine and allow

to cool, and secure the unit before storing or

transporting in a vehicle. Store unit and fuel

in an area where fuel vapors cannot reach

sparks or open flames from water heaters,

electric motors or switches, furnaces, etc.