Bar Maintenance; Carburetor Adjustment - Poulan Pro 2250, 2450, 2550, 2550 SE, 2555 Instruction Manual

Cleaning the air filter:
A dirty air filter decreases engine perform-
ance and increases fuel consumption and
harmful emissions. Always clean after 10
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.
Air Filter
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
Muffler
Muffler
Body
Cover
Cleaning is required every 25 hours of opera-
tion 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 arrest-
ing screen assembly. Notice the orientation
of these parts for reassembling.
4. Clean the spark arrestor screen with a wire
brush. Replace screen if breaks are found.
5. Replace any broken or cracked muffler
parts.
6. Reinstall diffuser and spark arrestor screen
assembly with round holes facing up.
7. Reinstall muffler cover and 2 screws.
Tighten securely.

CARBURETOR ADJUSTMENT

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
adjusting procedure.
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.
Adjust speed until engine runs without chain
movement (idle too fast) or stalling (idle too
slow). The idle speed screw is located in the
area above the primer bulb and is labeled T.
S Turn idle speed screw (T) clockwise to in-
Cylinder
crease engine speed.
Cover
S Turn idle speed screw (T) counterclock-
Screws
wise to decrease engine speed.
If you require further assistance or are unsure
about performing this procedure, contact your
Cylinder authorized
1- -800- -554- -6723.
Cover

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 necessary
to service your bar. A worn bar will damage
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-
Spark
tion.
Arresting
S Loosen and remove chain brake nuts and
Screen
chain brake. Remove bar and chain from
Muffler
saw.
Cover
S Clean the oil holes and bar groove after each
Screws
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
14
The chain will be mov-
service dealer or call
Oil Holes
File Rail Edges
and Sides
Square
Correct Groove