Bar Maintenance; Spark Plug; Storage; Chain Sharpening - Husqvarna 137, 142 Instruction Manual

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).
S Turn idle speed screw (T) clockwise to in-
crease engine speed.
S Turn idle speed screw (T) counterclock-
wise to decrease engine speed.

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 neces-
sary to service your bar. A worn bar will dam-
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 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.
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 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 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

STORAGE

WARNING:
Stop engine and allow to
cool, and secure the unit before storing or
transporting in a vehicle. Store unit and fuel in
an area where fuel vapors cannot reach sparks
or open flames from water heaters, electric mo-
tors or switches, furnaces, etc. Store unit with
all guards in place. Position so that any sharp
object cannot accidentally cause injury to
passersby. Store the unit out of reach of chil-
dren.
S Before storing, drain all fuel from the unit.
Start engine and allow to run until it stops.
S Clean the unit before storing. Pay particular
attention to the air intake area, keeping it free
of debris. Use a mild detergent and sponge
to clean the plastic surfaces.
S Do not store the unit or fuel in a closed area
where fuel vapors can reach sparks or an
open flame from hot water heaters, electric
motors or switches, furnaces, etc.
S Store in a dry area out of the reach of chil-
dren.
13