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d, DECELEHATION
CHECK
•
1.. Allow engine to idle, then squeeze throttle
t_gger fully.
2. Allowengine to run at full speedforabout 1
second.
_ ....
3. Release the throttle trigger to the i_e posi-
tion and listen to the deceleration of the en-
gine. It must return to idle smoothly
and
within i to 2 seconds.
a. If performance
is satisfactor_
pro-
ceed to step "4."
• b. If the engine slowly or erratically
returns
to idle or idles
erraticall_
;
repeat "Idle Speed Adjustment"
or con-
.tinue through- Low Speed Mixture and
High Speed Mixture Adjustments
to ob-
•....
tain proper deceleration.
• ,_
4. Recheck idle speed.
e. LOW SPEED
MIXTI2P_
ADJUSTMENT
:
1. _Allow engine to idle.
..........
2. Turn the low speed mixture
screw (Figure
24 ) slowly clockwise until the speed starts
to drop. Note this position.
3. Turn the low speed mixture screw Counter-
clockwise
until speed increases
and then
_ startsto
drop again. Note this position.
•
4. Set the low speed mixture screw at the mid-
point betweenthe
twopositions.
_
5, :.Follow
instructions
' in
'_cceieration
Check" and "Deceleration
Check,"
f. HIGH SPEED
_
ADJUSTMENT
_
[__Vo
not
operate
engine,
at
full
throttle
for prolonged
periods.while
mak-
ing high
speed
adjustments
as damage
to
the engine
can occur.
........
..,,,,,,,,
H,
Hm
ll.mlmmmmm
1. Support:the
lower endsothe
trimmer line
is offthe groundand
w_ not make contact
with anyobject,
....
.
2. Allow engine to idle, then squeeze throttle
trigger fully.
]_I_]_
Perform steps "3.,' through "5." at full
throttle.
3. Turn high
speed
mixture
screw
(Fig-
ure 24 )very slowly clockwise until engine
speed is reduced.
'
"
- 4. Turn high speed mixture screw very slowly
.......
counterclockwise.
Stop when the engine
.......
beginstorun roughly:
5. Turn screw slowly the minimum
amount
:
'
:_ _clockwise until the engine runs smoothly.
: 6. Follow
instructions
in
'_celeration
':!
Check" and "Deceleration
Check"_:
..
partment.
m
H]ghSpeed,
,_
Low Speed Adjustment
Screw
......"
"Nose
Cone"
/
i _
/
::AirFilter_,,
Idle Speed
:
.... Adjustment
.....
Screw ........
•
Figure
24
IHI
i!111
E. SPARK
PLUG
--
Replace
the spark plug yearly..
,,
i,
,,,
m,,,,,,,,,,,,,, HIll
ii iiiiiiiiiiiiiiiiiiii
ii
iii
iiii
llllilll
F. STARTER
ROPE
• Rep!_e a starter r opethatbrdaksl _
Neverstart
engine
with clutch
shroud
.removed; I
dutch
will fly apart
and cause
serious
gnjury.
_ 1:
,
A WARNING
Do not remove
pulley
tab and screw
or pulley.
iThe springbeneath
the pulley
is under
tension
and canfly
out and cause
serious
injury. If any
'part
of pulley
_honsing
_assembly
Is damaged
other
than the rope, do not use tool. Take it to
your SEA!_S Service
Center_epartment.
1. Disconnect
spark plug wire. Figure
25.
2. Remove the screw and nut from the throttle trig-
• get housing.
Figure
25.
3. Hold throttle trigger away from the foam grip and
remove the barrel end of the throttle cable from
'_ the throttle trigger. Figure 3.
4. Carefully pull throttle cable out of foam grip_
5. Remove the four clutch shroud screws with the
small hex wrench provided. Figure
25.
6. Separate clutch shroud from engine.
Figure 25.
Use only a hand tool to remove
the clutch,
Do not
use any type o fmotor_zed
tool or strike
the clutch
in any way. Otherwise,
the Vlutch
willfly
apart
and cause serious
i_ury.
'
.
Clutch
Shroud
.
SCrews •
Clutch
:Wire
Shroud_ * • •
• Throttle TriggerNut
'Figure
25
Throttle
Trigger
Screw
-17"
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