Cleaning The Spark Arresting Screen; Carburetor Adjustments; Bar Maintenance; Idle Speed - Poulan Pro PP4620AVX Instruction Manual

CLEANING THE SPARK
ARRESTING SCREEN
Clean every 25 hours of operation or annually,
whichever comes first.
Steel
Backplate
Muffler
Aluminum
Backplate
Muffler
Gasket
Bolt Cover
1. Loosen and remove the 3 cylinder cover
screws. Remove the cylinder cover.
2. Pull off the spark plug boot.
3. Loosen and remove the locknut from the
bolt cover. Remove the bolt cover.
4. Loosen and remove the 2 muffler bolts.
Remove the muffler and backplates. No-
tice the orientation of these parts for re-
assembling.
5. Locate the 2 outlet cover screws on the
muffler. Loosen and remove both
screws. Remove the outlet cover and
spark arresting screen.
BACK VIEW OF MUFFLER
Outlet Cover
Screws
Spark Arresting
Screen
6. Clean the spark arresting screen with a
wire brush. Replace screen if any wires
are broken or screen is blocked after
cleaning.
7. Reinstall spark arresting screen.
8. Reinstall outlet cover and 2 screws. En-
sure outlet cover and both screws are re-
installed correctly to prevent damage to
the saw (see illustrations). The exhaust
outlets must face the chain brake (bar
side) of the saw.
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:
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
Muffler
adjusting procedure.
Bolts
S 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.
Locknut
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.
S 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
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-
Muffler
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.
S Loosen and remove chain brake nuts and
chain brake. Remove bar and chain from
saw.
S Clean the oil holes and bar groove after each
5 hours of operation.
Remove Sawdust From
Guide Bar Groove
S Burring of guide bar rails is a normal
process of rail wear. Remove these burrs
with a flat file.
S When rail top is uneven, use a flat file to re-
store square edges and sides.
Worn Groove
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
15
The chain will be mov-
service dealer or call
Oil Holes
File Rail Edges
and Sides
Square
Correct Groove