Poulan Pro PP4620AVX Instruction Manual page 15

AIR FILTER
CAUTION: Do not clean fitter in gasoline
or other flammable solvent to avoid creating
a fire hazard or producing harmful evapora-
tive emissions.
Cleaning the air filter:
A dirty air filter decreases engine perform-
ance and increases fuet consumption and
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 fi_ter 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 annuaty, whichever
comes first.
1. Loosen 3 screws on cytnder cover
2. Remove cylinder cover.
3. Remove air f/tar.
4. Clean the air ftter using hot soapy water.
Rinse with clean cool water. Air dry com-
pletely before reinstaling.
5. Reinstat air liter.
6. Reinstal cylnder cover and 3 screws.
Tighten securely.
+_" Screws
INSPECT MUFFLER AND SPARK
ARRESTING SCREEN
As the unit is used, carbon deposits buld 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.
CLEANING THE SPARK
ARRESTING SCREEN
C_ean every 25 hours of operation or annualy,
whichever comes first.
3 teal
• _ Backplate
Muffler
/
'
,/
Aluminum ' f_/
P
Backplate Muffler
Casket
Dolt Cover Locknut
1. Loosen and remove the 3 cylnder cover
screws. Remove the cylinder cover.
2. Puil off the spark ptug boot.
3. Loosen and remove the Iocknut 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 Muffler
SparkscreenArresting _/ 7
6 Clean the spark arresting screen with a
wire brush. Replace screen if any wires
are broken or screen is blocked after
cleaning.
7 ReinstalIspark arresting screen
8 Reinstalloutlet cover and 2 screws En-
s ure outlet cover and both screws are re-
lnstaled correctly to prevent damage to
the saw (see ilustrations). The exhaust
outlets must face the chain brake (bar
side) of the saw
Exhaust Outl% tlet Cover
Exhaust Outlets must face
chain brake (bar side) of chain saw
9 Inspect the muffler gasket and replace if
damaged.
10 ReinstalI backplates> muffler gasket and
muffler using muffler bolts. Tighten until
secure.
11. ReinstalI bott cover and Iocknut.
12. ReinstalI the spark plug boot
13 Reinstall the cylinder cover and 3
screws Tighten securely.
CARBURETOR ADJUSTMENTS
_,WARNING:
The chain wll 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 carefuly set at the
factory. Adjustments may be necessary ff
you notice any of the following conditions:
• Chain moves at idle See IDLE SPEED-T
adjusting procedure
• Saw wi/not idle See iDLE SPEED-T ad-
justing procedure.
Idle Speed-T
Allow engine to idle. If the edain 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).
• Turn idle speed screw (T) clockwise to in-
crease engine speed.
15