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14
Cleaning the air filter:
A dirty air filter decreases engine 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. A used aire filter can never
be completely cleaned. It is adv isable to re-
place your airfilter witha newone after every
50hours ofoperation, orannually,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 r einstalling.
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 m uffler and spark arresting screen,
and must be removed to avoid creating afire
hazard or affecting engine performance.
Replace t hespark arresting screen if breaks
occur.
Muffler Diffuser
Muffler
Cover
Screws
Muffler
Cover
Muffler
Body
Spark
Arresting
Screen
Cleaning is required ever y 25 hours of oper a-
tion or annually, whichever com es fir st.
1. Loosen and remove the 2 muffler cover
screws.
2. Rem ovethe m uf fler cover(cover snapsoff
muffler body).
3. Rem ove m uf fler dif fuser and spark a rr est-
ingscreenassembly.Notice theorientation
of these parts for reassembling.
4. Cleanthe sparkarrestorscreenwith awire
brush.Replace screen ifbreaks are found.
5. Replace any broken or cracked muffler
parts.
6. Reinstalldiffuserandsparkarrestorscreen
assembly w ith round holes facing up.
7. Reinstall muffler cover and 2 screws.
Tighten secur ely.
CARBURETOR ADJUSTMENTS
Your carbur etor is equipped with limiter caps.
Carbur etor adjustment is a c omplicated task.
We recom mend that you take your unit to an
authorized ser v icedealer . D amagewill occurif
you turn the needl es beyond the limiter stops.
BAR MAINTENANCE
If your saw cuts to one side, has to be forc ed
through the c ut, or been run w ith an impr oper
amount of bar lubrication it m ay be necessar y
to ser vice your bar. A worn bar will dam age
your chain and make cutting difficult.
After each u se, ensur e O N /STO P sw itch is in
theSTOPposition, thenclean allsawdust from
the guide bar and sprocket hole.
To maintain guide bar:
S
Move O N /STO P s w itch to the ST OP posi-
tion.
S
Loosen and remove chain brake nut s and
chain brake. Remove bar and chain from
saw.
S
Cleanthe oilholes andbargrooveaftereach
5 hour s o f oper ation.
Remove Sawdust From
Guide Bar Groove
Oil Holes
S
Burringof guide barrailsisa normal process
of rail wear. R emove these burrs with a flat
file.
S
When rail top is uneven, use a flat f ile to re-
store squar e edges and sides.
Correct GrooveWorn Groove
File Rail E dges
and Sides
Square
Replace gui de bar w hen the g r oove is worn,
the guidebar isbent orcracked,or w henexce-
ss heating or bur r ing of the rails occurs. If re-
placement isnecessary,use onlythe guidebar
specified for your saw i n the r epair parts list or
on the decal located on t he chain s aw.
CHAIN SHARPENING
Chain sharpening is a complicated task that
requires special tools. We recommended
you refer chain sharpening to aprofessional
chain sharpener.
IGNITION TIMING
Ignition timing is fixed and nonadjustable.
SPARK PLUG
The s park plug should be replaced each
year to ensure the engi ne starts easier and
runs better.
1. Loosen 3 screws on cylinder cover.
2. Remove the cylinder cover.
3. Pull off t he spark plug boot.
4. Remove spark plug from cylinder and
discard.
5. Replace with Champion RCJ--7Y spark
plug and tighten securely with a 3/4 inch