Service; Air Filter; Carburetor Adjustment; Bar Maintenance - Husqvarna 137 Instruction Manual

A
WARNING:
Disconnect the spark
plug before performing maintenance except
for carburetor adjustments.
We recommend all service and adjustments
not listed in this manual be performed by an
authorized service dealer.
MAINTENANCE SCHEDULE
Check:
Fuel mixture level .... Before each use
Bar _ubrication ....... Before each use
Chain tension ....... Before each use
Chain sharpness .... Before each use
For damaged parts .. Before each use
For loose caps ...... Before each use
For loose fasteners... Before each use
For loose parts ...... Before each use
Inspect and Clean:
Bar ................ Before each use
Complete saw ....... After each use
Air filter ............. Every 5 hours*
Chain brake ........ Every 5 hours*
Spark arresting screen
and muffler ......... Every 25 hours*
Replace spark plug , Yearly
Replace fuel filter.,, Yearly
* Hours of Operation
AIR FILTER
CAUTION: Do not clean filter in gasoline
or other flammable solvent to avoid creating
a fire hazard or produch_g harmful evapora-
tive emissions.
Cleaning the air filter:
A dirty air filter decreases engine perfomq-
ance and increases fuel consumption and
harmful emissions. Always clean after every
5 hours of operation.
1. Clean the cover and the area around it to
keep dirt and sawdust from falling into
the carburetor chamber when the cover
is removed.
2. Remove the parts as illustrated below.
3. Wash the filter in soap and water. Rinse
in clean cool water. Air dry completely
before reinstafling.
4. Reinstall parts.
_,_\ Air filter
f,ter
_ ,-.,_vf" "_ screws
MUFFLER AND SPAR KARRESTING
SCREEN
A_,WARNING:
The muffler on this
product contains chemicals known to the
State of California to cause cancer.
NOTE: THE SPARK ARRESTING
SCREEN ON THiS UNiT IS NOT SER-
VICEABLE.
For normal homeowner use, the muffter and
spark arresting screen will not require re-
placement. After 75 hours of use, we recom-
mend that your muffler be replaced by your
authorized Husqvarna service dealer.
CARBURETOR ADJUSTMENT
,_ WARNING: Thechain will bemoving
during most of this procedure. Wear your pro-
tective equipment and observe atl 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:
• Chain moves at idle. See iDLE SPEED-T
adjusting procedure.
• 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. Ad-
just speed until engine runs without chain
movement (idle too fast) or stalling (idle too
sbw).
• Turn idle speed screw (T) clockwise to in-
crease engine speed.
• 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:
• Move ON/STOP switch to the STOP posi-
tion.
• Loosen and remove bar knob and clutch
cover. Remove bar and chain from saw.
• Clean the oil holes and bar groove after
each 5 hours of operation.
Remove Sawdust From _t" jl_
Guide Bar G_OV_
Oil Holes • ca
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