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Idle Fuel Adjusting
Idle Speed
Needle (If Equipped)
Adjusting Screw
Control
Cable
Stop
Clamp
Choke Control
Screw
Cable
2.
Remove
air cleaner
cover, filter and
cartridge
plate to expose
carburetor
choke
(See "AIR FILTER"
in the Mainte-
nance
section
of this manual).
3.
Choke
should
be closed.
If it is not,
loosen
casing
clamp
screw and move
choke cable
until choke
is completely
closed.
Tighten
casing
clamp
screw
securely.
4.
Reassemble
air cleaner.
Closed For Full
Choke
TO ADJUST
CARBURETOR
The carburetor
has been present
at the
factory
and adjustment
should
not be nec-
essary.
However,
minor adjustment
may
be required
to compensate
for differences
in fuel, temperature,
altitude
or load. If the
carburetor
does
need adjustment,
proceed
as follows:
In general,
turning
the adjusting
needles
in (clockwise)
decreases
the supply
of
fuel to the engine
giving
a leaner fuel/air
mixture. Turning
the adjusting
needles
out
(counterclockwise)
increases
the supply
of fuel to the engine
giving a richer
fuel/air
mixture.
IMPORTANT:
Damage
to the needles
and the seats
in carburetor
may result if
screw
is turned
in too tight.
PRELIMINARY
SETTING
-
1. Be sure you have a clean air filter, and
the throttle
control
cable
is adjusted
properly
(see "TO ADJUST
THROTTLE
CONTROL
CABLE"
in the Service
and
Adjustments
section
of this manual).
2.
With engine
off turn idle fuel adjust-
ing needle
in (clockwise)
closing
it
finger
tight and then turn out (counter-
clockwise)
1 turn.
FINAL
SETTING
-
1. Start engine
and allow to warm for five
minutes.
Make final adjustments
with
engine
running
and shift/motion
control
lever in neutral
(N) position.
NOTE:
The high idle is set at the factory
and cannot
be adjusted.
2.
Idle speed
setting
- With throttle
control
lever in slow
position,
engine
should
idle at 1750 RPM. If engine
idles too
slow or fast, turn idle speed
adjusting
screw
in or out until correct
idle is at-
tained.
3.
Idle fuel needle setting
- With throttle
control
lever in slow position,
turn idle
fuel adjusting
needle
in (clockwise)
until engine
speed
decreases
and then
turn out (counterclockwise)
approxi-
mately
3/4 turn to obtain
the best low
speed
performance.
4.
Recheck
idle speed.
Readjust
if neces-
sary.
ACCELERATION
TEST
-
5.
Move throttle
control
lever from slow
to fast position.
If engine
hesitates
or
dies, turn idle fuel adjusting
needle
out
(counterclockwise)
1/8 turn. Repeat
test and continue
to adjust,
if neces-
sary, until engine
accelerates
smoothly.
High speed
stop is factory
adjusted.
Do
not adjust-damage
may result.
IMPORTANT:
Never tamper
with the
engine
governor,
which
is factory
set
for proper
engine
speed.
Overspeeding
the engine
above the factory
high speed
setting
can be dangerous.
If you think the
engine-governed
high speed
needs
ad-
justing,
contact
a Sears
or other qualified
service
center,
which
has proper
equip-
ment and experience
to make any neces-
sary adjustments.
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