Final Setting - Craftsman LAWN TRACTOR 917.270962 Owner's Manual

20.5 hp electric start 42" mower automatic lawn tractor
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then turn out (counterclockwise)
1-1/4
to 1-1/2 turns.
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.
• With throttle
control
lever in slow
position,
hold throttle
lever against
idle
speed screw
and adjust idle speed
screw to obtain
1200 to 1400 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
900 to 1200
RPM.
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.
_
IdleeSP eed
--......Idle Mixture
Screw
Throttle
Lever
Idle Speed_
_(__
Screw_
Throttle
Lever _
Mixture
Screw
28

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