NGTE:Usecautionwhenremovingthe 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 unbal- anced 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 22_
Nail_\ _/\
FIGURE 22.
e 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 procedure be performed by your nearest Sears Service Department
CARBURETORADJUSTMENT
WARNING: IF ANY ADJUSTMENTS ARE MADE TO THE ENGINE WHILE THE
ENGINE IS RUNNING (E.G. CARBURE-
TOR)p KEEP CLEAR OF ALL MOVING PARTS. BE CAREFUL OF HEATED SUR-
FACES 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 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
The carburetor may need
e Close needle valve (see figure 23) clockwise ((_) finger tight only. Forcing may cause damage. Then open
®Start engine and allow to warm for five minutes
e Close needle valve clockwise
open needle valve counterclockwise (,'_) until engine JUST BEGINS to run unevenly. This mix-
ture should be rich enough for best performance under load
O Rotate throttle counterclockwise (,'_) and hold against throttle stop.
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
O Test the engine by using the
Idle Speed Adjust _g Screw
Throttle
Idle Mixture
Needle Valve
(High Speed)
FIGURE 23.
ENGINESPEED
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
nearest SEARS Service Center for repair and adjust- ment
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