Final Setting - Craftsman EZ3 917.270680 Owner's Manual

16.0 hp electric start 42" mower automatic lawn tractor
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PRELIMINARY
SETTING
-
• Air cleaner
assembly
must be as-
sembled
to the carburetor
when
making
carburetor
adjustments.
• Be sure the throttle
control cable is
adjusted
properly
(see above).
FINAL SETTING
-
• Start engine
and allow to warm for five
minutes.
Make final adjustments
with
engine
running
and shift/motion
control
lever in neutral
(N) position.
• Move throttle
control
lever to slow
position.
With finger, rotate and hold
throttle
lever
against
idle speed
screw.
Turn idle speed screw to attain 1750
RPM.
• While still holding throttle
lever against
idle speed screw,
turn idle mixture
valve full travel clockwise
then counter-
clockwise
until engine
runs rough.
Turn valve to a point midway
between
those two positions.
Release
throttle
lever.
ACCELERATION
TEST -
• Move throttle
control
lever from slow to
fast position.
If engine
hesitates
or
dies, turn idle mixture valve 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.
Idle Speed
Screw
Idle Mixture Valve _
with Limiter
27

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