Poulan Pro 2450 LE Instruction Manual page 14

Cleaning the air filter:
A dirty air filter decreases engine perfomq-
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 c_eaned. 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
_i_Screws
Cylinder
Cover
./)
INSPECT MUFFLER AND SPARK
ARRESTING SCREEN
_WARNING:
The muffler on this
product contains chemicals known to the
State of California to cause cancer.
As the unit is used, carbon deposits build up
on the muffler and spark arresting screen,
and must be removed to avoid creating afire
hazard or affecting engine performance.
Replace the spark arresting screen if breaks
occur.
CLEANING THE SPARK ARREST-
ING SCREEN
Cleaning is required every 25 hours of op-
eration or annually, whichever comes first.
Outlet
Guide
Backplate
Muffler
Gasket
Muffler
/
Muffler
_/ Bolts
Bolt Cover
Locknut
1. Loosen and remove the Iocknut from the
bolt cover.
2. Remove the bolt cover.
3. Loosen and remove the 2 muffler bolts.
Remove the muffler, muffler gasket, out-
let guide and backplate. Notice the ori-
entation of these parts for reassembling.
4. Locate the 2 outlet cover screws on the
muffler. Loosen and remove both
screws.
5. Remove the outlet cover.
_ Outlet Cover BACK ViEW OF
MUFFLER
Muffler
Screws
6,
7.
Spark Arresting
Screen
8,
9.
Remove spark arresting screen.
Ctean the spark arresting screen with a
wire brush. Replace screen if any wires are
broken or screen is blocked after cleaning.
Reinstall spark arresting screen.
Reinstall outlet cover and 2 screws. En-
sure outlet cover and both screws are re-
installed correctly (see illustrations) to
prevent damage to the saw. The ex-
haust outlet must face the chain brake
(bar side) of the saw.
Outlet Cover
Exhaust
_,. _/
Outlet
Exhaust Outlet must face chain
brake (bar side) of chain saw
10. inspect the muffler gasket and replace if
damaged.
11. Reinstall backplate, outlet guide, muffler
gasket, and muffler using muffler bolts.
Tighten until secure.
12. Reinstall bolt cover and Iocknut. Tighten
securely.
CARBURETOR ADJUSTMENT
_1= 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.
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