Filter
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13
harmful emissions. Always clean after every
5 hours of operation.
S
Clean the cover and t he area around it to
keep dirt and sawdust from falling into the
carburetor chamber when the cover is re-
moved.
S
Remove the parts as illustrated.
S
Wash t he filter in soap and water.
S
Replace parts.
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 toavoid creating afire
hazard or affecting engine performance.
Replace the spark arresting screen if breaks
occur.
Spark Arrestor
Screen
CLEANING THE SPARK ARREST-
ING SCREEN
Clean every 25 hours of operation o rannually ,
whichever comes first.
S
Loosen and remove the muffler cover
screws.
S
Remove the muffler cover(cover snapsoff
muffler body).
S
Remove muffler diffuser and spark arrest-
ing screen assembly. Notice the orienta-
tion of parts for reassembly.
S
Clean the spark arresting screen with a
wire brush. Replace screen if breaks are
found.
S
Replace any broken or cracked muffler
parts.
S
Reinstall diffuser and spark arresting
screen assembly with holes facing up and
toward muffler cover.
S
Reinstall muffler cover andscrews (7-8 ft-
lbs.).
CARBURETOR ADJUSTMENTS
Your carburetor is equipped with limiter
caps. Carburetor adjustment is a compli-
cated task. We recommend that you take
your unit to an Authorized Service Dealer.
Damage will occur ifyou turnthe needles be-
yond the limiter stops.
BAR MAINTENANCE
If your saw cuts to one side, hasto beforced
through the cut, orbeen run with animproper
amount of bar lubrication it may be neces-
sary toservice your bar.A wornbar willdam-
age your chain and make cutting difficult.
After each use, ensure ON/STOP switch is
in the STOP position, then clean all sawdust
from the gui de bar and sprocket hole.
To maintain guide bar:
S
Move ON/STOP switch to the S TOP posi-
tion.
S
Loosen and remove chain brake nut s 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
Sprocket Hole
Oil H oles
S
Add lubricant to sprocket hole after each
use.
S
Burring of guide bar rails is a normal pro-
cessof railwear. Removethese burrswith
a flat file.
S
When rail top isuneven, useaflat file to re-
store square edges and sides.
Correct GrooveWorn Groove
File Rail Edges
and Sides
Square
Replace gui de barwhen t he groove is worn,
the guide bar is bent or cracked, or when
excess heating orburring ofthe rails occurs.
If replacement is necessary, use only the
guide barspecified 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.
S
Loosen and remove the screws on thecyl-
inder cover.
S
Remove the cylinder cover.
S
Pull off the spark plug boot.
S
Remove spark plug from cylinder and dis-
card.
S
Replace with Champion RCJ--7Y spark
plug and tighten with a 3/4 inch socket
wrench (10-12 ft-lbs). Spark plug gap
should be 0.025 inches.
S
Reinstall the spark plug boot.