MTD 643 - Manuals

5 SECTION 2: ASSEMBLING YOUR SNOW THROWER NOTE: References to right or left side of the snowthrower are determined from behind the unit in theoperating position. The “operator’s position” is definedas standing directly behind the snow thrower, facing thehandle panel. Unpacking • Remove screws from t...

6 SECTION 3: KNOW YOUR SNOW THROWER Figure 5 WARNING: Read, understand, and followall instructions and warnings on themachine and in this manual beforeoperating. Traction Control / Auger Control Lock The traction control is located on the right handle. Squeeze the traction control to engage the whee...

7 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 ...

8 Recoil Starter • Rotate choke knob to FULL choke position (cold engine start). If engine is warm, place choke in OFF position instead of FULL. • Push primer button two or three times. If engine is warm, push primer button once only. NOTE: Always cover vent hole in primer button whenpushing. Additi...

9 Figure 6 Chute Clean-Out Tool The chute clean-out tool is conveniently fastened to the rear of the auger housing with a mounting clip. Should snow and ice lodge itself in the discharge chute during operation, proceed as follows to safely clean the chute and chute opening: • Release both the Auger ...

10 SECTION 5: MAKING ADJUSTMENTS WARNING: NEVER attempt to make anyadjustments while the engine is running,except where specified in the operator’smanual. Tire Pressure (Pneumatic Tires) • The tires are overinflated for shipping purposes. Before operating check tire pressure and reduce pressure to b...

12 wheel hub.This position gives power drive to the left wheel only, making the unit easier to maneuver. Both Wheels Driving • Rotate wheel assembly to align hole in the hub with the inner hole on the axle shaft. Insert klick pin in the hole. Outer axle shaft hole should be visible. IMPORTANT: NEVER...

13 Traction Control / Auger Control Lock The cams on the ends of the control rods which interlock the traction drive and auger drive controls must be lubricated at least once a season or every 25 hours of operation. The cams can be accessed beneath the handle panel. Use a multi-purpose automotive gr...

14 • Drain the gasoline from the snow thrower, or place a piece of plastic film under the gas cap. • Tip the snow thrower up and forward so that it rests on its auger housing. • Remove the six self-tapping screws from the frame cover underneath the snow thrower. • Roll the front and rear auger belts...

16 SECTION 8: TROUBLE SHOOTING NOTE: For repairs beyond the minor adjustments above, contact your local authorized service dealer. Trouble Possible Cause(s) Corrective Action Engine fails to start Fuel tank empty, or stale fuel. Blocked fuel line.Choke not in ON positionFaulty spark plug.Key not in ...

MANUFACTURER’S LIMITED WARRANTY FOR: The limited warranty set forth below is given by MTD LLC with respect to new merchandise purchased and used in the United States, its possessions and territories. MTD LLC warrants this product against defects for a period of two (2) years commencing on the date o...