Filter
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14
Cleaning the air filter:
A dirty air filter decreases engi ne perform-
ance and increases fuel 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. Aused aire filter cannever
be completely cleaned. It is advisable to re-
place your airfilter with anewone after every
50hours ofoperation, 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 coolwater. Air drycom-
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.
Air Filter
Cylinder
Cover
Screws
Cylinder
Cover
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 avoidcreating a fire
hazard or affecting engine performance.
Replace the spark arresting screen if breaks
occur.
Muffler Diffuser
Muffler
Cover
Screws
Muffler
Cover
Muffler
Body
Spark
Arresting
Screen
Cleaning is requir ed every 25 hour s of oper a-
tion or annually, whichever comes first.
1. Loosen and remove the 2 muffler cover
screws.
2. Rem ovethemuffler cover(cover snapsoff
muffler body).
3. Rem ove muffler diffuser and spark arrest-
ingscreenassembly.Notice theorientation
of these parts for reassembling.
4. Cleanthe sparkarrestorscreenwith awire
brush.Replace screen ifbreaks are found.
5. Replace any br oken or cracked muffler
parts.
6. Reinstalldiffuserandsparkarrestorscreen
assembly with round holes facing up.
7. Reinstall muffler cover and 2 screws.
Tighten securely.
CARBURETOR ADJUSTMENTS
Your car bur etor is equipped with limiter caps.
Carbur etor adjustment is a complicated task.
We recommend that you take your unit to an
authorized ser v icedealer . Damagewill occurif
you turn the needles beyond the limiter stops.
BAR MAINTENANCE
If your saw c uts to one side, has to be forced
through the cut, or been run with an improper
amount of bar lubrication it may be necessary
to service y our bar. A worn bar will damage
your chain and make cutting dif ficult.
After each use, ensure ON/STOP switch is in
theSTOPposition, thencleanallsawdust from
the guide bar and spr ocket hole.
To maintain guide bar:
S
Move ON/STOP switch to the ST OP posi-
tion.
S
Loosen and r em ove chain brake nuts and
chain brake. Remove bar and chain from
saw.
S
Cleantheoil holesand bargrooveaftereach
5 hours o f operation.
Remove Sawdust From
Guide Bar Groove
Oil H oles
S
Burringof guide barrailsisa normal pr ocess
of rail wear. Remove these bur r s with a flat
file.
S
When rail top is uneven, use a flat file to re-
store square edges and sides.
Correct GrooveWorn Groove
File Rail Edges
and Sides
Square
Replace guide bar w hen the groove is worn,
the guidebar isbent orcracked,or w henexce-
ss heating or bur r ing of the rails occur s. If re-
placement isnecessary, useonlythe guidebar
specified for your saw in the repair parts list or
on the decal located o n the chain saw.
CHAIN SHARPENING
Chain sharpening is a complicated task that
requires special tools. W e 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.
1. Loosen 3 screws on cylinder cover.
2. Remove the cylinder cover.
3. Pull off the spark plug boot.
4. Rem ove spark plug from cylinder and dis-
card.
5. Replace with Champion RCJ--7Y spark
plug and tighten securely with a 3/4 inch