Flails, Carburetor adjustment, Engine speed – Craftsman 247.797855 User Manual
Page 15
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NOTE: Use caution when removing the blade to avoid
contacting the weld boits on the housing,
®
When
sharpening
the
blade,
follow
the
original
angle of grind as a guide. It is extremely important
that each cutting edge receives an equal amount of
grinding to prevent an unbalanced blade. An unbal
anced
blade
will
cause
excessive
vibration
when
rotating at high speeds and may cause damage to
the unit
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if
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w
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on a round shaft screwdriver or nail. Remove metal
from the heavy side until it is balanced evenly See
figure 21.
FIGURE 21.
®
When
reassembling
the
blade,
tighten
to
between
550
and
650
inch
pounds,
or
lacking
torque
wrench, tighten securely,
FLAILS
The
flails,
located
inside
the
housing,
may
be
reversed when they become dull. It is suggested that
tfiis
procedure
be
performed
by
your
nearest
Sears
Service Department.
CARBURETOR ADJUSTMENT
WARNING- IF ANY ARJII<iTMFNT<i ARF
MADE TO THE ENGINE WHILE THE
ENGINE IS RUNNING (E.G. CARBURE
TORS KEEP CLEAR OF ALL MOVING
PARTS.
BE
CAREFUL OF HEATED SUR
FACES AND MUFFLER.
A
Minor carburetor adjustment may be required to com
pensate
for
differences
in
fuel,
temperature,
altitude
or load.
A | o r 'i I T A M C r D
\ M l i
I r ^ A I I C f T
l \ l
I
* M «
*
i n J 1 1 » i I I i i V / L » , 1
m
r \
I » i w i i W I L - r L . L > r *
K J
O w
ENGINE
TO
RUN
ROUGH
BE
CERTAIN
AIR
GLEANER
IS
CLEAN
AND
ATTACHED
TO
THE
CARBURETOR
BEFORE
ADJUSTING
CARBURE
TOR.
DO
NOT
MAKE
UNNECESSARY
ADJUST
MENTS.
FACTORY
SETTINGS
ARE
SATISFACTO
RY FOR MOST APPLICATIONS AND CONDITIONS.
Never attempt to change maximum engine speed. It is
pre-set at the factory and should be changed only by
a
qualified
service
technician
who
has
the
necessary
equipment
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 22} 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 (p^ ) the needle valve slightly to
provide
a
richer
mixture.
This
richer
mixture
may
cause a slight unevenness in idling.
Throttle
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.
15