Poulan Pro 2550 Instruction Manual page 14

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.
Cylinder
Air Filter Cover
/¢Screws
Cylinder
Cover
J}
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.
f__, ii.iM u ffler Diffuser
Spark
Arresting
k '_ .z/. I!_..'%,/I '/Screen
_, ".M_ / _l _.
_
} /, Muffler
%.--LI ,ANI
Cover
Cleaning is required every 25 hours of opera-
tion or annualIy, 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:
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:
• 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). The idle speed screw is located in the
area above the primer bulb and is labeled T.
• 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 or catl
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 necessary
to service your bar. A worn bar will darnage
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:
• 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 affer each
5 hours of operation,
• Burring of guide bar rails is a normal process
of rail wear. Remove these burrs with a flat
file.
• When rait top is uneven, use a flat file to re-
store square edges and sides.
"_ File Rail
Edges_'- n r]
and Sides
I u I
Square
I I
Worn Groove Correct Groove
14