MTD 643, 663 manual Operating Your Snow Thrower

Headlight

The headlight is on whenever the engine is running.

Throttle Control

The throttle control is located on the engine. It regulates the speed of the engine and will shut off the engine when pushed down completely. See Figure 5.

Clean-Out Tool

The chute clean-out tool is fastened to the top of the auger housing with a mounting clip. The tool is

designed to clear a clogged discharged chute. Refer to

Operating Your Snow Thrower section for more detailed

information regarding the chute clean-out tool. See Figure 5.

WARNING: Never use your hand to clear a clogged discharged chute. Shut off engine and remain behind handles until all moving parts have stopped before unclogging.

SECTION 4: OPERATING YOUR SNOW THROWER

Before Starting

WARNING: Read, understand, and follow all instructions and warnings on the machine and in this manual before operating.

Gas And Oil Fill-up

Service the engine with gasoline and oil as

instructed in the separate engine manual packed with your snow thrower. Read instructions carefully.

WARNING: Use extreme care when handling gasoline. Gasoline is extremely flammable and the vapors are explosive. Never fuel machine indoors or while the engine is hot or running. Extinguish cigarettes, cigars, pipes an other sources of ignition.

•A plastic cup is provided inside the fuel fill opening on the fuel tank. Remove and discard this cup before filling up the tank. Use the separate fuel tank cap to close after fill-up.

To Start Engine

•Attach spark plug wire to spark plug. Make certain the metal loop on end of the spark plug wire (inside the boot) is fastened securely over the metal tip on the spark plug.

•Make certain the fuel cut-off valve, if your snow thrower is so equipped, is in OPEN position.

•Make certain the auger and drive clutch levers are in the disengaged (released) position.

•Move throttle control up to FAST position. Insert ignition key into slot. Be certain it snaps into place.

Do not turn key.

NOTE: Engine will not start unless ignition key is inserted into ignition slot in carburetor cover.

Electric Starter

•Determine that your house wiring is a three-wire grounded system. Ask a licensed electrician if you are not certain.

•If your house wiring system is not a three-wire grounded system, do not use this electric starter under any conditions.

WARNING: The electric starter is equipped with a grounded three-wire power cord and plug and is designed to operate on 120 volt AC household current. It must be used with a properly grounded three-prong receptacle at all times to avoid the possibility of electric shock. Follow all instructions carefully prior to operating the electric starter.

•If your home electrical system is grounded, but a three-hole receptacle is not available, one should be installed by a licensed electrician before using the electric starter.

•If you have a grounded three-prong receptacle, proceed as follows:

•Rotate choke knob to OFF position and do not prime engine.

•Connect power cord to switch box on engine. Plug the other end of power cord into a three-hole, grounded 120 volt AC receptacle.

•Push starter button on top of the engine to crank engine. As you crank the engine, move choke knob to FULL choke position.

•When engine starts, release starter button, and move choke gradually to OFF. If engine falters, move choke immediately to FULL and then gradually to OFF.

•When disconnecting the power cord, always unplug from the three-prong receptacle first and then from the snow thrower.

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