16
Air Filter
Air Filter
Cover
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 a void creating a fire
hazard or affecting engine performance.
Replace the spark arresting screen if breaks
occur.
Nut
Muffler
Spark
Arresting
Scree n
Exhaust
Outlet
Cover
CLEANING THE SPARK ARREST-
ING SCREEN
Cleaning is required every 25 hours of op-
eration or annually, whichever comes first.
1. Loosen and remove the nut from the ex-
haust outlet cover .
2. Remove the exhaust oulet cover .
3. Remove spark arresting screen. H andle
screen carefully to pr event damage.
4. Clean the spark arresting screen gently
with a wire brush. Replace s creen if
breaks a re found.
5. Replace any broken or cracked muffler
parts.
6. Reinstall spark arresting screen, exhaust
outlet cover , and nut. Tighten nut securely.
REPLACE SPARK PLUG
The spark plug should be replaced each
year to ensure the engine starts easier and
runs better. Ignition timing is fixed and non-
adjustable.
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
(19 mm) socket wrench. Spark plug gap
should be 0.025 inch ( 0,6 mm).
6. Reinstall the spark plug boot.
7. Reinstall the cylinder cover and 3
screws. Tighten securely.
Spark
Plug
Cylinder
Cover
Spark
Plug Boot
REPLACE FUEL FILTER
To replace f uel filter , drain your unit by run-
ning it dry of fuel. Remove fuel cap and it s
connected retainer from tank. Pull filter from
tank and remove from line. Replace and re-
assemble.
CHAIN ADJUSTMENT
See CHAIN TENSION in ASSEMBLY section .
CHAIN SHARPENING
WARNING: Improper chain sharp-
ening techniques and/or depth gauge mainte-
nance will increase the chance of kickback
which can result in serious injury.
WARNING: W ear p rotective gloves
when handling chain. The chain is sharp and
can cut you even when it is not moving.
Conditions which indicate the need for chain
sharpening:
S Reduction in size of wood chips. The size
of t hewood chipwill decrease a s t hechain
gets duller until it becomes more like a
powder than a chip. Note that dead or
rotted wood w ill not produce a good chip.
S Saw cuts t o one side or at an angle.
S Saw has to be forced through the cut.
Tools required:
S 5/32 inch (4 mm) diameter round file and
file holder
S Flat file
S Depth gauge tool
TO SHARPEN CHAIN:
1. Move ON/STOP switch to the STOP
position.
2. Check chain for proper tension. Adjust
chain tension if necessary. See CHAIN
TENSION section.
3. Sharpen cutters.
S To sharpen the cutters, position the
file holder level (90˚) so that it rests
on the top edges of the cutter and
depth gauge.
NOTE: The chain has both left and
right hand cutters.
