d. DECELERATIONCHECK
1. Allow en_e
to idle, then squeeze throttle
trigger fully.
2. Allow engine to run at ful! speed for about 1
3. Release the throttle trigger to the idle posi-
tion and listen to the deceleration
of the en-
gine.
It must return
to idle smoothly
and
within 1 to 2 seconds.
a. If performance
is satisfactor_
pro-
ceed to step "4."
b. if the engin, e slow.lv or erratically
returns
to idle or Idles
erratically,
repeat "Idle Speed Adjustment" or con-
tinue thr_agh Low Speed Mixture
and
High Speed Mixture Adjustments to ob-
tain proper deceleration.
4. Recheck idle speed.
e, LOW SPEED MIXTURE
ADJUS22YIEN_r
1. Allow engine to idle.
2. Turn the low speed mixture screw (Figure
25_) slowly cl_oc]Awi'se u ntil the speed starts
to drop. Note this position.
3. Turn the low speed mixture screw counter-
clockwise
until the speed increases
and
then s_rts
to drop agmn. Note this posi-
tion.
4. set the low speed mixture screw at the mid-
point between
the two positions.
5. Follow
instructions
in
"Acceleration
Check" end "Deceleration
Check,"
f. HIGH SPEED MIXTURE
ADJUSTMENT
[__
Do not operate
engine
at full
_ttle
for prolonged
periods
while
mak-
high
speed
adjustments
as damage
to
the engine
can occur.
iHi
H,H
I ,, ,,I ,I
,
.................
1. Support the lower end so the trimmer line
is off the ground and will not make contact
with any object.
2. Allow engine to idle, then squeeze throttle
throttle.
3. Turn
high
speed
mixture
screw
(Fig-
ure 25 ) very slowly clock_me until engine
speed is reduced.
4. Turn high speed _e
screwvery slowly
counterclockwise.
Stop when the engine
begins to run roughly.
5. Turn screw slowly the minimum amount
clockwise until the engine runs smoothly.
6. Follow
instructions
in
"Acceleration
Check" and "Deceleration Check".
[-CA_
If the engine
does not operate
ac-
cording
to these
instructions
after repeat-
the adjusting
steps,
do not use the unit,
Take it to your Authorized
Set'Ace
Dealer.
High Speed
Low Speed Adjustment
Screw
"Nose Cone _'
Screws
/
Air Filter
Idle Speed
Cover
Adjustment
crew
Figure 25
E. STARTER
ROPE
•
Replace a starter rope that breaks.
I
A DANGER
I
Never start
the engine
with the clutch
shroud
re- ]
moved.
The clutch
will fly apart
and cause seri- I
ous u
I
A WARNING
Do not remove
the retaining
tab and screw
or
The spring
beneath
the pulley
is un.
out and cause serious
in-
housing
assembly
is
rope, do not use unit.
Service
Dealer.
1. Disconnect
spark plug wire.
Figure 26.
2. Removethe
screw from the trigger housing. (refer
to Figure 4 ).
3. Remove the trigger housing from the handlebar.
4. Carefully pu_ wire assembly out of the foam grip.
5. Loosen two "Nose Cone" screws and remove the
tube from the clutch shroud. Figure 26.
6. Remove the four clutch shroud screws with the
small hex wrench provided. Figure 26.
7. Separate clutch shroud from engine.
Figure 26.
Clutch
Shroud Screws
"Nose Cone"
Screws
Plug
Clutch
Wire
Shroud
Figure 26
i
A DANGER
'{
Use only a hand
tool to remove
the clutch.
Do n!?t].
use any
type
of motorized
unit
or stril_e
the l
clutch
in any way.
Otherwise,
the clutch
will fly [
apart
and cause serious
injury.
I
8. Hold the "Flats" of the clutch with an adjustable
wrench.
Figure 27 (inset).
Remove the nut coun-
terclockwise
with a wrench.
Clutch will slide off the crankshaft intact.
Do not disassemble
the clutch.
9. Remove the cupped washer, clutch, and large fiat
washer
as shown in Figure
27.
10.Remove
p_Lfltey- hous_mg _om eng:me. ,._re
27.
-20-