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 advisable to re-
place your air filter with a new one after every
50 hours of operation, 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 cool water. Air dry com-
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 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-
ing screen assembly. Notice the orientation
of these parts for reassembling.
4. Clean the spark arrestor screen with a wire
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 carburetor is equipped with limiter caps.
Carburetor adjustment is a complicated task.
We recommend that you take your unit to an
authorized service dealer. Damage will occur 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 bar lubrication it may 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
the STOP position, then clean all sawdust from
the guide bar and sprocket hole.
To maintain guide bar:
S
Move ON/STOP switch to the STOP posi-
tion.
S
Loosen and remove chain brake nuts and
chain brake. Remove bar and chain from
saw.
S
Clean the oil holes and bar groove after each
5 hours of operation.
Remove Sawdust From
Guide Bar Groove
Oil Holes
S
Burring of guide bar rails is a normal process
of rail wear. Remove these burrs with a flat
file.
S
When rail top is uneven, use a flat file to re-
store square edges and sides.
Correct Groove
Worn Groove
File Rail Edges
and Sides
Square
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 parts 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.
1. Loosen 3 screws on cylinder cover.
2. Remove the cylinder cover.
3. Pull off the 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
