Cleaning The Spark Arrest- Ing Screen; Carburetor Adjustments; Bar Maintenance; Chain Sharpening - Poulan Pro Poulan 1950 Instruction Manual

harmful emissions. Always clean after 15
tanks of fuel or 5 hours of operation, which-
ever comes first. Clean more frequently in
dusty conditions. A used aire filter can never
be completely cleaned. It is advisable to re-
place your air filter with a new one after every
50 hours of operation, or annually, whichever
comes first.
1. Loosen 3 screws on cylinder cover.
2. Remove cylinder cover.
3. Remove air filter.
4. Clean the air filter using hot soapy water.
Rinse with clean cool water. Air dry com-
pletely before reinstalling.
5. Lightly oil air filter before installing to im-
prove the efficiency of air filter. Use
2--cycle engine oil or motor oil (SAE 30).
Squeeze excess oil from filter.
6. Reinstall air filter.
7. Reinstall cylinder cover and 3 screws.
TIghten securely.
Cylinder Cover
Air Filter
Screws
Cylinder
Cover
INSPECT MUFFLER AND SPARK
ARRESTING SCREEN
As the unit is used, carbon deposits build up
on the muffler and spark arresting screen,
and must be removed to avoid creating a fire
hazard or affecting engine performance.
Replace the spark arresting screen if breaks
occur.
Muffler Diffuser
Spark
Arresting
Screen
Muffler
Muffler
Body
Cover
CLEANING THE SPARK ARREST-
ING SCREEN
Cleaning is required every 25 hours of op-
eration or annually, whichever comes first.
1. Loosen and remove the 2 muffler cover
screws.
2. Remove the muffler cover (cover snaps
off muffler body).
3. Remove muffler diffuser and spark ar-
resting screen assembly. Notice the
orientation of these parts for reassem-
bling.
4. Clean the spark arresting screen with a
wire brush. Replace screen if breaks are
found.
5. Replace any broken or cracked muffler
parts.
6. Reinstall diffuser and spark arresting
screen assembly with round holes facing
up.
7. Reinstall muffler cover and 2 screws.
Tighten securely.

CARBURETOR ADJUSTMENTS

Your carburetor is equipped with limiter
caps. Carburetor adjustment is a compli-
cated task. We recommend that you take
your unit to an authorized service dealer.
Damage will occur if you turn the needles be-
yond the limiter stops.

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.
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
Oil Holes
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.
File Rail Edges
Muffler
Cover
Screws
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 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.
14
and Sides
Square
Correct Groove