Sears 358.356090-3.7/20" - Manual (Page 23)

IDLE SPEED ADJUSTMENT—II
a. Allow engine to idle.
b. Adjust if the chain is turning by turning the
Idle Speed Screw counterclockwise
.
c. Squeeze the throttle trigger; The saw
should accelerate without hesitating.
NOTE: It may be necessary to recheck the
low speed mixture setting after the idle
speed has been reduced by repeating “Low
Speed Mixture Adjustment" as in step 3
above.
HIGH SPEED MIXTURE ADJUSTMENT
a. Make a test cut.
b. Adjust if the saw smokes or seems to have
low power in the test cut by turning the
High Speed Mixture Screw 1/16th of a turn
clockwise ,
c. Repeat test cut.
d. Repeat adjustment until the saw runs
...—smoothly^........-......................................-...........
|CAUTION:l Never set the High Speed Mixture
Screw less than 7/8 turn open. This is too lean
a setting and will ruin your engine.
1 . IDLE SPEED ADJUSTMENT—III
Recheck for proper idle mixture setting.
NOTE: It may be necessary to repeat Idle
Speed Adjustment-! and Low Speed Mixture.
Adjustment.
CHECK ACCELERATION
Adjust if there is a slight hesitation, by turn­
ing the Low Speed Mixture Screw 1/16 of a
turn at a time counterclockwise un­
til you have snriooth acceleration.
NOTE: Check to be sure the chain is not turn­
ing when engine is idling. If chain moves at
.idle speed, repeat-ldle Speed Adjustment-ll...........
F. AIR FILTER
• A dirty air filter.
—reduces cutting power
—increases fuel consumption
• Clean the Air Filter
—frequently, especially under very dusty
conditions.
—always after 10 tanks of fuel mixture or 5 1
ICAUTION:! Never operate the unit without the
air filter in place to avoid engine damage.
Items Required: soft bristled brush, such as a
paintbrush.
Clean off the carburetor cover and the area
around it.
2. Close choke to prevent dirt from entering the
carburetor. ‘
3. Remove the carburetor cover. Figure 57.
4. Remove the air filter carefully.
5. Soak the filter in soap and water.
|CAUTION:ID o not use gasoline or other flam­
mable liquid to clean the filter to avoid creating
a fire hazard.
6. Brush away all dust and debris from the filter,
7.
Allow filter to dry.
8. Brush away all debris from surfaces which
were covered by the carburetor cover.
9. Replace filter and carburetor cover.
G. COUNTER-VIBE® VIBRATION SYSTEM
This saw is equipped with a counter vibration
system consisting of 5 isolator mounts. Figure
58. The Isolator Mounts protect the user from
engine, bar, and chain vibration similar to the
way shock absorbers on a car protect from jolts
and bumps in the road.
1. Check isolators each time the saw is used.
2. Replace isolators when:
—vibration increases
—mounts develop an out of round or
swollen shape usually caused from
exposure to gasoline and oil for long
periods of time. \
3. Replace all five isolators when a failure to one
" "''^'Occurs. ■ ' 'L " ' ' ""'L
23