Carburetor adjustment, Engine speed – Craftsman 247.799640 User Manual

Page 17

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BELT

REMOVAL

AND REPLACEMENT

Support

WARNING; Disconnect the spark plug
wire and move away from the spark plug.

• Remove the plastic belt cover on the front of the

engine by removing two self-tapping screws. Refer
to figure 19.

•

Drain the gasoline and oil from the chipper-

vacuum.

•

Tip the unit backward so that it rests on the

handles.

• Remove the frame cover by removing eight self

tapping screws from underneath the chipper-
vacuum. Refer to figure 14.

•

Remove the idler pulley bracket as follows. See

figure 25.

• Take the tension off the belt by pivoting the

idler pulley toward you, and line up the holes in

the idler bracket assembly. Insert a nail or simi

lar object through the holes to hold the idler
pulley in this position,

• Remove three seif-tapping screws, and lift off

the idler bracket assembly.

•

Remove the hex bolt and lock washer from the

engine pulley. See figure 25. Slip the engine pulley
off the engine shaft, and remove the belt from the
pulley.

• Loosen the nut on the stop bolt until there is clear

ance between the support bracket and the friction
wheel disc. See figure 26.

• Slip the belt between the friction wheel and friction

wheel disc. Remove and replace belt. Reassemble
following instruction in reverse order.

NOTE: The support bracket must rest on the stop bolt
after the new belt has been assembled.

CARBURETOR ADJUSTMENT

WARNING: IF ANY ADJUSTMENTS ARE

MADE TO THE ENGINE WHILE THE
ENGINE IS RUNNING (E.G. CARBURE
TOR), KEEP CLEAR OF ALL MOVING
PARTS. BE CAREFUL OF HEATED SUR
FACES AND MUFFLER.

The carburetor has been pre-set at the factory and
should not require adjustment. However, if your
engine does not operate properly due to suspected
carburetor problems, take your chipper-vacuum to
your nearest SEARS Service Center.

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-vacuum to the
nearest SEARS Service Center for repair and adjust
ment.