Craftsman 536.88644 HOW to Replace the Auger Shear Bolt, To Adjust the Carburetor, To adjust

12.Fastenthe bearing plates using the four bolts removed earlier.

13.Make sure the hex shaft turns free- ly.

14.Check the adjustment of the friction

wheel. See "How To Adjust The Friction Wheel" in this section.

15.Make sure the friction wheel and the

disc drive plate are free from grease or oi!.

16.Install the bottom panel. See Figure 28.

17.Tighten the bottom bolts on each side of the bottom panel.

18.Install the top bolts on each side of the bottom panel.

19.Correct the spark plug wire.

HOW TO REPLACE THE AUGER SHEAR BOLT

The augers are secured to the auger shaft with special shear bolts. These shear bolts are designed to break and protect the ma- chine if an object becomes lodged in the au- ger housing. Do not use a harder bolt as the

protection provided by the shear bolt will be lost.

protect the machine, use only

_ARNING: For safety and to original equipment shear bolts.

To replace a broken shear bolt, proceed as follows. Extra shear bolts were pro- vided in the assembly parts bag.

1.Move the throttle control to the stop position. Disengage all controls.

2.Disconnect the spark plug wire. Make sure all moving parts have stopped.

,Align the hole in the auger with the hole in the auger shaft, install the new shear pin and spacer. See Figure 33.

4.Connect the spark plug wire.

_arPin

_-" P! spalcer

_F igure 33

TO ADJUST THE CARBURETOR

If you think your carburetor needs ad- justing, see your nearest Craftsman Store. Engine performance should not be affected at altitudes up to 7,000 feet. For operation at higher elevations, con- tact your nearest Craftsman Store.

IMPORTANT: Never tamper with the engine governor, which is factory set for proper engine speed. Over-speeding the engine above the factory high speed setting can be dangerous. If you think the engine-governed high speed needs adjusting, contact your nearest Craftsman Store, which has the proper equipment and experience to make any necessary adjustments.

TO ADJUST OR REPLACE THE SPARK PLUG

NOTE: This spark ignition system meets all requirements of the Canadian

Interference-Causing Equipment Regu- lations.

NOTE: This engine complies with all current Australian and New Zealand

limitations regarding electromagnetic interference.

If you have difficulty starting the snow thrower, adjust or replace the spark plug. Replace the spark plug is the electrodes are pitted or bumed or if the

porcelain is cracked. Follow the instruc- tions below.

To adjust:

1.Clean spark plug by carefully scraping the electrodes (Do not sand blast or use a wire brush).

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