Poulan 1975 - Manual (Page 14)

MAINTENANCE SCHEDULE_________
Check;
Fuel mixture level . . -. Before each use
Bar lubrication.............. Before each use
Chain tension .............. Before each use
Chain sharpness.......... Before each use
For damaged parts . -. Before each use
For loose caps .............Before each use
For loose fasteners . -. Before each use
For loose parts ............ Before each use
Inspect and Clean:
Bar................................ Before each use
Complete saw...............After each use
Air filter..........................Every 5 hours*
Chain brake.................. Every 5 hours*
Spark arresting screen
and muffler................... Every 25 hours*
Replace spark plug . Yearly
Replace fuel filter . -. Yearly
* Hours of Operation -
Each hour of operation is ^proximately
2 tanks of fuei.
AIR FILTER
CAUTION: Do not clean filter in gasoline
Of
other flammable solvent to avoid creating
a fire hazard or producing harmful evapora­
tive emissions-
Cleaning the air filter;
A dirty air fitter decreases the iife and perfor­
mance of the engine and i ncreases fuei con­
sumption and harmful emissions. Always
clean your air filter after 10 tanks of fuel or 5
hours of operation, whichever comes first.
Clean more frequently in dusty conditions, A
used air filter can never be completely
cleaned, it is advisable to replace your air fil­
ter with a new one after every 50 hou rs of op­
eration, or annually, whichever comes first.
1. Loosen 3 screws on cylinder cover.
2. Remove cylinder cover.
3. Remove air fitter.
4. Clean the air filter using hot soapy water.
Rinse with dean cool water. Air dry
completely before reinstalling.
5. Lightly oil air filter before installing to im­
prove the efficiency of air filter. Use
2-cycie engine oil or motor oil (SAE 30).
Squeeze excess oii from filter,
6. Reinstall air fitter.
7.
Reinstall cylinder cover and 3 screws.
Tighten securely.
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 afire
hazard or affecting engine performance.
Replace the spark arresting screen if breaks
occur.
Muffler Diffuser
Spark
. Arresting
' / Screen
Muffler
Body Muffler^"**=£^ ^
Cover
CLEANING THE SPARK ARREST­
ING SCREEN
Cleaning is required every 25 hours of op­
eration or annually, 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 ar­
resting screen assembly. Notice the
orientation of these parts for reassem­
bling.
4- Clean the spark arresting screen with a
wire brush. Replace screen if breaks are
found.
5- Replace any broken or cracked muffler
parts.
6. Reinstall diffuser and spark arresting
screen assembly with round holes fac­
ing 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
Ailow 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 (idie 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 idie speed screw (T) counterclock­
wise to decrease engine speed.
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