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TO ADJUST
CARBURETOR
The carburetor has been preset at the
factory
and adjustment
should not be
necessary.
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 mixture
screw
in
(clockwise)
decreases
the supply
of fuel
to the engine
giving
a leaner fuel/air
mixture.
Turning the mixture screw 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
SE]-I-IN G -
• Be sure you have a clean air filter, and
the throttle
control
cable and choke
are adjusted
properly
(see above).
• With engine off turn idle mixture
screw
in (clockwise)
closing it finger tight and
then turn out (counterclockwise)
1-1/4
to 1-1/2 turns.
FINALSE-I-I-ING-
• Start engine and allow to warm for five
minutes.
Make final adjustments
with
engine
running
and shift/motion
control
lever in neutral
(N) position.
• With throttle
control lever in slow
position,
hold throttle
lever against
idle
speed
screw and adjust
idle speed
screw to obtain
1300 to 1500 RPM.
• While
still holding
throttle
lever against
idle speed
screw, turn idle mixture
screw
In (clockwise)
until engine
begins to die and then turn out
(counterclockwise)
until engine
runs
rough.
Turn screw to a point midway
between
those two positions.
• Continue
to hold throttle
lever against
idle speed
screw
and adjust idle
speed screw to obtain
1200 RPM, if
the governed
idle spring
is red, or 900
RPM, if the governed
idle spring is
white.
Release
throttle
lever.
ACCELERATION
TEST -
• Move throttle
control
lever from slow to
fast position.
If engine
hesitates
or
dies, turn idle mixture
screw 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
adjusting,
contact
your nearest
autho-
rized service
center/department,
which
has proper
equipment
and experience
to
make any necessary
adjustments.
Choke Closed
J
Leve
/:;
C ho k e..._._._
O
o
Clamp
Screw
Throttle
Idle Speed
Screw
Idle Mixture
Screw
26
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