Poulan PR5020 Owner Manual - Page 15

Poulan PR5020 Manual

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CARBURETOR ADJUSTMENT CLEANING THE SPARK ARRESTING SCREEN aa WARNING: The chain will be moving 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 adjustment procedure. • Saw will not idle. See IDLE SPEED-T adjustment 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 screw (T) clockwise to increase engine speed. • Turn idle screw (T) counterclockwise to decrease engine speed. If you require further assistance or are unsure about performing this procedure, contact your authorized service dealer or call customer support. 1. Cleaning is required every 25 hours of operation or annually, whichever comes first. 2. Loosen knob on air filter cover. Remove air filter cover. 3. Loosen 3 screws on cylinder cover. Remove the cylinder cover. 4. Loosen and remove the screw from the muffler exhaust outlet cover. 5. Remove spark arresting screen. Handle screen carefully to prevent damage. 6. Clean the spark arresting screen gently with a wire brush. Replace screen if breaks are found. 7. Replace any broken or cracked muffler parts. 8. Reinstall spark arresting screen. 9. Reinstall screw in muffler exhaust outlet cover. 10. Reinstall the cylinder cover and 3 screws. Tighten securely. 11. Reinstall air filter cover. Tighten knob securely. REPLACE SPARK PLUG The spark plug should be replaced each year to ensure the engine starts easier and runs better. Ignition timing is fixed and nonadjustable. 1. Loosen knob on air filter cover. Remove air filter cover. 2. Pull off the spark plug boot. 3. Remove spark plug from cylinder and discard. 4. Replace with specified spark plug and tighten securely with a socket wrench. 5. Reinstall the spark plug boot. 6. Reinstall air filter cover. Tighten knob securely. COOLING SYSTEM To keep the working temperature as low as possible the machine is equipped with a cooling system. The cooling system consists of: • Air intake on the starter • Air guide plate • Fins on the flywheel • Cooling fins on the cylinder • Cylinder cover (directs cold air over the cylinder) Clean the cooling system with a brush after each use, more often in demanding conditions. A dirty or blocked cooling system results in the machine overheating which causes damage to the piston and cylinder. 15

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CLEANING THE SPARK ARRESTING
SCREEN
1.
Cleaning is required every 25 hours of operation or
annually, whichever comes Frst.
2.
Loosen knob on air Flter cover. Remove air Flter
cover.
3.
Loosen 3 screws on cylinder cover.
Remove the cylinder cover.
4.
Loosen and remove the screw from the muf±er
exhaust outlet cover.
5.
Remove spark arresting screen. Handle screen
carefully to prevent damage.
6.
Clean the spark arresting screen gently with a wire
brush. Replace screen if breaks are found.
7.
Replace any broken or cracked muf±er parts.
8.
Reinstall spark arresting screen.
9.
Reinstall screw in muf±er exhaust outlet cover.
10.
Reinstall the cylinder cover and 3 screws. Tighten
securely.
11. Reinstall air Flter cover. Tighten knob securely.
REPLACE SPARK PLUG
The spark plug should be replaced each year to
ensure the engine starts easier and runs better.
Ignition timing is Fxed and nonadjustable.
1.
Loosen knob on air Flter cover. Remove air Flter
cover.
2.
Pull off the spark plug boot.
3.
Remove spark plug from cylinder and discard.
4.
Replace with speciFed spark plug and tighten
securely with a socket wrench.
5.
Reinstall the spark plug boot.
6.
Reinstall air Flter cover. Tighten knob securely.
CARBURETOR ADJUSTMENT
a
WARNING:
The chain will be moving
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 adjustment
procedure.
•
Saw will not idle. See IDLE SPEED-T
adjustment
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 screw (T) clockwise to increase engine
speed.
• Turn idle screw (T) counterclockwise to decrease
engine speed.
If you require further assistance or are unsure about
performing this procedure, contact your authorized
service dealer or call customer support.
COOLING SYSTEM
To keep the working temperature as low as possible
the machine is equipped with a cooling system.
The cooling system consists of:
•
Air intake on the starter
•
Air guide plate
• ²ins on the ±ywheel
• Cooling Fns on the cylinder
• Cylinder cover (directs cold air over the cylinder)
Clean the cooling system with a brush after each use,
more often in demanding conditions. A dirty or blocked
cooling system results in the machine overheating
which causes damage to the piston and cylinder.
15