Poulan Pro 3450 Instruction Manual page 14

• Wash the filter in soap and water. Air dry
completely before reinstalling.
• Replace parts.
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.
Spark Arrestor _'
Screen
CLEANING THE SPARK ARREST-
ING SCREEN
Clean every 25 hours of operation or annually,
whichever comes first.
• Loosen and remove the muffler cover
screws,
• Remove the muffler cover (cover snaps off
muffler body).
• Remove muffler diffuser and spark arrest-
ing screen assembly. Notice the orienta-
tion of parts for reassembly.
• Clean the spark arresting screen with a
wire brush. Replace screen if breaks are
found.
• Replace any broken or cracked muffler
parts.
• Reinstall diffuser and spark arresting
screen assembly with holes facing up and
toward muffler cover.
• Reinstall muffler cover and screws. Tight-
en securely.
CARBURETOR ADJUSTMENTS
Your carburetor is equipped with limiter
caps. Carburetor adjustment is a compli-
cated task. We recommend that you take
your unit to an authorized service dealer.
Damage will occur if you turn the needles be-
yond the limiter stops.
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 neces-
sary to service your bar. A worn bar will dam-
age 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 end remove chain brake nuts and
chain brake. Remove bar and chain from
saw.
• Clean the oil holes and bar groove after
each 5 hours of operation.
Remove Sawdust From _t'_
Guide Bar Groo_,.,_.._/"
"_ V Sprocket Hole
o,,.o,es ."
• Add lubricant to sprocket hole after each
use.
• Burring of guide bar rails is a normal pro-
cess of rail wear. Remove these burrs with
e flat file.
• When rail top is uneven, use a fiat file to re-
store square edges and sides.
r_ File Rail Edges--_ N N
and Sides I U I
Square I I
Worn Groove Correct Groove
Replace guide bar when the groove is worn,
the guide bar is bent or cracked, or when exce-
ss heating or burring of the rails occurs. If re-
placement is necessary, use only the guide bar
specified for your saw in the repair pads list or
on the decal located on the chain saw.
CHAIN SHARPENING
Chain sharpening is a complicated task that
requires special tools. We recommended
you refer chain sharpening to a professional
chain sharpener.
IGNITION TIMING
Ignition timing is fixed and nonadjustable.
SPARK PLUG
The spark plug should be replaced each
year to ensure the engine starts easier and
runs better.
• Loosen and remove the screws on the cyl-
inder cover.
• Remove the cylinder cover.
• Pull off the spark plug boot.
• Remove spark plug from cylinder and dis-
card.
• Replace with Champion RCJ-7Y spark
plug and tighten securely with a 3/4 inch
socket wrench. Spark plug gap should be
0.025 inches.
• Reinstall the spark plug boot.
• Reinstall the cylinder cover and screws.
Tighten securely.
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