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. Aused aire filter can never
be completely cleaned. It is advisable tore-
place your air filter with a new one after every
50hours of operation, orannually, whichever
comes first.
1. Loosen 3 screws on cy linder cover.
2. Remove cylinder cover.
3. Remove air filter.
4. Clean the air f ilter using hot s oapy water.
Rinsewit h clean cool water. Air dry com-
pletely before reinstalling.
5. Lightly oil air filter before installingto im-
prove the efficiency of air filter. Use
2--cycleengine oil or mot or oil (SAE 30).
Squeeze excess oil from filter.
6. Reinstall air filter.
7. Reinstall c ylinder cover and 3 screws.
TIghten securely.
Air Filter Cylinder
Cover
Screws
Cylinder
Cover
INSPECT MUFFLER AND SPARKARRESTING SCREEN
Ast he unit is used, carbon deposit s build up
on the muffler and spark arresting screen,
andmust be removed to avoid creating 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 required every 25 hours of opera-
tion 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 arrest-
ingscreen assembly. Notice the orientation
of these parts for reassembling.
4. Clean the spark arrestor screen with awire
brush.Replace screen if breaks are found.
5. Replace any broken or cracked muffler
parts.
6. Reinstall diffuser and spark arrestor screen
assembly with round holes facing up.
7. Reinstall muffler cover and 2 screws.
Tighten securely.
CARBURETOR ADJUSTMENTS
Your carburetoris equipped with limiter caps.
Carburetor adjustment is a complicated task.
We recommend that you take your unit to an
authorizedservice dealer. Damagewilloccur if
you turn the needles beyond 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 barl ubricationi tmay be necessary
to service your bar. A worn bar will damage
your chain and make cutting difficult.
After each use, ensure ON/STOP switch is in
theSTOP position, then clean all sawdust from
the guide bar and sprocket hole.
Tomaintain guide bar:
SMove ON/STOP switch to the STOP posi-
tion.
SLoosen and remove chain brake nuts and
chain brake. Remove bar and chain from
saw.
SCleanthe oil holes and bar groove after each
5 hours of operation.
Remove Sawdust From
Guide Bar Groove
Oil Holes
SBurringof guide bar rails is a normal process
of rail wear. Removethese burrs with a flat
file.
SWhen rail top is uneven, usea flat file t ore-
store square edges and sides.
Correct GrooveWorn Groove
File Rail Edges
and Sides
Square
Replace guide bar when the groove is worn,
theguide bar i s bent or cracked, or whenexce -
ss heating or burring of the rails occurs. Ifre-
placementis necessary, use only the guide bar
specified for your saw in the repair parts list or
on the decal located on the chain saw.
CHAIN SHARPENING
Chain sharpening isa complicated task that
requires special tools . We recommended
you refer chain sharpening to a professional
chain sharpener.
IGNITION TIMING
Ignition timing is fixed andnonadjustable.
SPARKPLUG
The spark plug should be replaced each
year to ensure the engine starts easier and
runs better.
1. Loosen 3 screws on cy linder cover.
2. Remove the cylinder cover.
3. Pull off the spark plug boot.
4. Remove spark plug from cylinder and dis-
card.
5. Replace with Champion RCJ--7Yspark
plug and tighten securely witha 3/4 inch