Engine speed, Throttle figure 17 – Sears 247.799892 User Manual
Page 14
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The
carburetor
may
need
re-adjusting
if
engine
lacks
power
or
does
not
idle
properly.
If
adjustments
are
needed, proceed as follows.
•
Close
needle
valve
(see
figure
17)
clockwise
('^
)
finger
tight
only.
Forcing
may
cause
damage.
Then open 1-1/2 turns counterclockwise ).
•
Start engine and allow to warm for five minutes.
•
With
throttle
in
FAST
position,
close
needle
valve
clockwise
('^
)
until
engine
starts
to
lose
speed
(lean
mixture).
Then
slowly
open
needle
valve
counterclockwise
)
until
engine
JUST
BEGINS
to
run
unevenly.
This
mixture
should
be
rich
enough for best performance under load.
•
Place throttle control in IDLE position.
If engine idles, no further adjustment is necessary.
If
engine
idles
too
fast,
turn
idle
speed
adjusting
screw
counterclockwise
(*^
)
until
slower
speed
is
obtained.
If
engine
dies,
turn
idle
speed
adjusting
screw
1/4
turn
clockwise
).
Place
throttle
control
in
FAST
position and restart engine.
Move
throttle
control
to
IDLE
position.
If
engine
does not idle, repeat third step.
•
Test
the
engine
by
using
the
chipper-shredder.
If
engine
tends
to
stall
or
die
out,
it
usually
indicates
that the mixture is slightly lean and it may be nec
essary
to
open
(i<^
)
the
needle
valve
slightly
to
provide
a
richer
mixture.
This
richer
mixture
may
cause a slight unevenness in idling.
Throttle
FIGURE 17.
ENGINE SPEED
Your
engine
speed
has
been
factory
set.
Do
not
attempt
to
increase
engine
speed
or
it
may
result
in
personal
injury.
If
you
believe
the
engine
is
running
too
fast
or
too
slow,
take
your
chipper-shredder
to
the
nearest
SEARS
Service
Center
for
repair
and
adjust
ment.
14