Spark Plug; Chain Sharpening; Carburetor Adjustment - Partner P842 Instruction Manual

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 bar 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.
File Rail Edges
and Sides
Square
Worn Groove Correct Groove
Replace guide bar when the groove is worn,
the guide bar is bent or cracked, or when
excess heating or burring of the rails occurs.
If replacement 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.

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 19 mm
socket wrench. Spark plug gap should
be 0,5 mm.
6. Reinstall the spark plug boot.
7. Reinstall the cylinder cover and 3
screws. Tighten securely.
Spark
Plug Boot
Spark
Plug

CHAIN SHARPENING

WARNING
: Failure to properly sharp-
en the chain considerably increases the risk of
kickback.
Chain sharpening is a complicated task that
requires special tools. We recommend that
you refer chain sharpening to a professional
chain sharpener.

CARBURETOR ADJUSTMENT

WARNING
: The chain will be moving
during most of this procedure. Wear your pro-
tective equipment and observe all safety pre-
cautions. The chain must not move at idle
speed.
The carburetor has been carefully set at the
factory. Adjustments may be necessary if
you notice any of the following conditions:
S Chain moves at idle. See IDLE SPEED- -T
adjusting procedure.
S Saw will not idle. See IDLE SPEED- -T ad-
justing procedure.
Idle Speed--T
Allow engine to idle. If the chain moves, idle
is too fast. If the engine stalls, idle is too slow.
Adjust speed until engine runs without chain
movement (idle too fast) or stalling (idle too
slow). The idle speed screw is located in the
area above the primer bulb and is labeled T.
S Turn idle speed screw (T) clockwise to in-
crease engine speed.
S Turn idle speed screw (T) counterclock-
wise to decrease engine speed.
14
Cylinder
Cover