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Blade
R
FIGURE
20,.
e Hold the blade retainer on the impetier assembly
with an adjustable wrench to keep the blade from
turning as shown in figure 2Q
e Remove the blade by removing the center bolt, lock
washer and ftat washer
NOTE: Use caution when removing the blade to avoid
contacting the weld bolts on the housing.
e 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 un-
balanced blade will cause excessive vibration when
rotating at high speeds and may cause damage to
the unit
e The blade can be tested for balance by balancing
it on a round shaft screwdriver or nail. Remove metal
from the heavy side until it is balanced evenly See
figure 2t
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 this pro-
cedure be performed
by your nearest Sears Service
Department
CARBURETORADJUSTMENT
WARNING:
IF ANY ADJUSTMENTS
ARE
MADE
TO
THE
ENGINE
WHILE
THE
ENGINE
IS
RUNNING
(EoG,. CAR-
BURETOR),
KEEP
CLEAR
OF
ALL
MOVING
PARTS.
BE
CAREFUL
OF
HEATED SURFACES
AND MUFFLER.
Minor carburetor adjustment
may be required to com-
pensate for differences in fuel, temperature, altitude or
load
NOTE: A DIRTY AIR CLEANER WILL CAUSE ENGINE
TO RUN ROUGH.
BE CERTAIN
AIR CLEANER
IS
CLEAN AND ATTACHED
TO THE CARBURETOR
BEFORE
ADJUSTING
CARBURETOR.
DO
NOT
MAKE UNNECESSARY
ADJUSTMENTS
FACTORY
SETTINGS ARE SATISFACTORY
FOR MOST AP-
PLICATIONS 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
e Close needle
valve
(see figure
22) clockwise
( ,'_ ) finger tight only Forcing may cause damage
Then open !1/z turns counterclockwise
( f_ )
e Start engine and allow to warm for five minutes
e With throttle in FAST position, close needle valve
clockwise (,'_)
until engine starts to lose speed
(lean mixture)
Then
slowly open
needle valve
counterclockwise
( f-', ) 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
( t'm ) until slower speed is
obtained
tf engine dies, turn idle speed adjusting screw 1/4
turn clockwise (('_)
Place throttle control in FAST
position and restart engine
Move throttle cont(ot to IDLE position If engine does
not idle, repeat step c
14
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