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Craftsman 917.276640 Operator's Manual Page 27

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ENGINE
Maintenance,
repair,
or replacement
of
the emission
control
devices
and systems,
which
are being done at the customers
ex-
pense,
may be performed
by any non-road
engine
repair establishment
or individual.
Warranty
repairs
must be performed
by an
authorized
engine
manufacturer's
service
outlet.
TO ADJUST
THROTTLE
CONTROL
CABLE
The throttle
control
has been preset
at the
factory
and adjustment
should
not be nec-
essary.
Check
adjustment
as described
below
before
loosening
cable.
If adjust-
ment is necessary,
proceed
as follows:
1.
With engine
not running,
move throttle
control
lever from slow to choke posi-
tion.
Slowly
move lever from choke
to
fast position.
2.
Check
that holes "A"
in governor
control
lever and hole in governor
plate
line-up.
If holes "A" are not aligned,
loosen
clamp
screw
and move throttle
cable until
holes
are aligned.
Tighten
clamp screw
securely.
Governor
Governor
_1 Lever
Plate
Holes "A"
Clamp
Throttle
Screw
Cable
TO ADJUST
CARBURETOR
NOTE:
The carburetor
on this engine
is
low emission.
It is equipped
with an idle
fuel adjusting
needle
with a limiter
cap,
which
allows
some adjustment
within
the
limits allowed
by the cap.
Do not attempt
to remove
the limiter cap. The limiter cap
cannot
be removed
without
breaking
the
adjusting
needle.
The carburetor
has been preset
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
idle mixture
valve in
(clockwise)
decreases
the supply
of fuel to
the engine
giving
a leaner fuel/air
mix-
ture.
Turning
the idle mixture
valve out
(counterclockwise)
increases
the supply
of fuel to the engine
giving
a richer fuel/air
mixture.
27
IMPORTANT:
Damage
to the needle
valve and the seat in carburetor
may result
if screw
is turned
in too tight.
PRELIMINARY
SETTING
-
1. Air cleaner
assembly
must be assem-
bled to the carburetor
when
making
carburetor
adjustments.
2.
Be sure the throttle
control
cable
is
adjusted
properly
(see above).
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.
2.
Move throttle
control
lever to slow posi-
tion. With finger, rotate and hold throttle
lever
against
idle speed
screw. Turn
idle speed
screw
to attain 1750 RPM.
3.
While
still holding
throttle
lever against
idle speed
screw, turn idle mixture
valve full travel clockwise
then coun-
terclockwise
until engine
runs rough.
Turn valve to a point midway
between
those two positions.
Release
throttle
lever.
ACCELERATION
TEST -
4.
Move throttle
control
lever from slow
to fast position.
If engine
hesitates
or
dies, turn idle mixture
valve out (coun-
terclockwise)
1/8 turn.
Repeat
test and
continue
to adjust,
if necessary,
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.
Overspeed-
ing the engine
above
the factory
high
speed
setting
can be dangerous.
If you
think the engine-governed
high speed
needs
adjusting,
contact
a Sears
or other
qualified
service
center,
which has proper
equipment
and experience
to make any
necessary
adjustments.
_Throttle
Lever
Idle Speed
____°_
Screw
ii__
With Limiter

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