Inspecting Muffler And Spark Arresting Screen; Replacing Fuel Filter; Cleaning The Spark Arresting Screen/Replacing Spark Plug; Chain Sharpening - Poulan Pro PP4218AVX Instruction Manual

6. Reinstall cylinder cover and 3 screws.
Tighten securely.
Cylinder
Air Filter Cover
Cover
_Y
INSPECT MUFFLER AND SPARK
ARRESTING SCREEN
As the unit is used, carbon deposits build up
on the muffler and spark arresedg screen,
and must be removed to avoid creating a fire
hazard or affecting engine performance
Replace the spark arresting screen if breaks
occur.
Spark Exhaust
Arresting Outlet
Cover
/
CLEANING THE SPARK ARREST-
ING SCREEN
Cleaning is required every 25 hours of op-
eration or annuaIly, whichever comes first.
1. Loosen and remove the nut from the ex-
haust outtet cover.
2. Remove the exhaust ouiet cover
3. Remove spark arresting screen. Handle
screen carefully to prevent damage.
4. Clean the spark arresting screen gently
w_th a wire brush. Replace screen if
breaks are found.
5. Replace any broken or cracked muffler
parts.
6. Reinstall spark arres_ng 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-
adjustabIe.
1. Loosen 3 screws on cylinder cover
2. Remove the cylinder cover.
3. Pult off the spark plug boot.
4-. Remove spark plug from cylinder and
discard.
5. Replace with Champion RCJ-7Y spark
pIug and tighten securely with a 3/4 inch
(19 mm) socket wrench. Spark p_ug gap
should be 0.025 inch (0,6 mm).
6 Reinstallthe spark plug boot.
7 Reinstall the cylinder cover and 3
screws. Tighten securely.
Cylinder
Cover
Plug Boot
Spark
Plug
REPLACE FUEL FILTER
To replace fuel filter, drain your unit by run-
ning it dry of fuel Remove fuel cap and its
connected retainer from tank. Putl 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 wilI increase the chance of kickback
which can result in serious injury.
_i_ WARNING: Wear 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:
• Reduction in size of wood chips The size
of the wood chip witl decrease as the chain
gets duller untit it becomes more like a
powder than a chip. Note that dead or
rotted wood will not produce a good chip.
• Saw cuts to one side or at an angle
• Saw has to be forced through the cut.
Tools required:
• 5/32 inch (4 rqm) diarqeter round file and
file holder
• Fiat fiIe
• 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.
• 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 leff and
right hand cutters
16