MTD 643 663 Snow Blower Owners Manual

OPERATOR’S MANUAL Snow Thrower Models 643 & 663 IMPORTANT: READ SAFETY RULES AND INSTRUCTIONS CAREFULLY Warning: This unit is equipped with an internal combustion engine and should not be used on or near any unimproved forestcovered, brush-covered or grass-covered land unless the engine’s exhaust system is equipped with a spark arrester meeting applicable local or state laws (if any). If a spark arrester is used, it should be maintained in effective working order by the operator. In the State of California the above is required by law (Section 4442 of the California Public Resources Code).

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Other states may have similar laws. Federal laws apply on federal lands. A spark arrester for the muffler is available through your nearest engine authorized service dealer or contact the service department, P.O. Box 361131 Cleveland, Ohio 44136-0019. MTD LLC P.O. BOX 361131 CLEVELAND, OHIO 44136-0019 PRINTED IN U.S.A. FORM NO. 769-00377.fm (6/02) TABLE OF CONTENTS Content Page Important Safe Operation Practices . 3 Assembling Your Snow Thrower . 5 Know Your Snow Thrower . 6 Operating Your Snow Thrower 7 Making Adjustments 10 Maintaining Your Snow Thrower 12 Servicing Your Snow Thrower . 13 Troubleshooting . 16 Parts List 17 FINDING MODEL NUMBER This Operator’s Manual is an important part of your new Snow Thrower. It will help you assemble, prepare and maintain the unit for best performance. Please read and understand what it says. Before you start assembling your new equipment, please locate the model plate on the equipment and copy the information from it in the space provided below. The information on the model plate is very important if you need help from your local authorized dealer. You can locate the model number by looking at the lower frame cover on the rear of your snow thrower. A sample model plate is explained below. For future reference, please copy the model number and the serial number of the equipment in the space below. Copy the model number here: MTD LLC P. O. BOX 361131 CLEVELAND,OH 44136 330-220-4683 800-800-7310 Copy the serial number here: www.mtdproducts.com ENGINE INFORMATION The engine manufacturer is responsible for all engine-related issues with regards to performance, powerrating, specifications, warranty and service. Please refer to the engine manufacturer’s Owner’s/Operator’s Manual packed separately with your unit for more information. CALLING CUSTOMER SUPPORT Please do NOT return the unit to the retailer from which it was purchased, without first contacting Customer Support. Should you have difficulty assembling this product or have any questions regarding the controls, operation or maintenance of this unit, please call the Customer Support Department. Call 1- (330) 220-4MTD (4683) or 1- (800)-800-7310 to reach a Customer Support representative. Please have your unit’s model number and serial number ready when you call. See previous section to locate this information. You will be asked to enter the serial number in order to process your call. For more details about your unit, visit our website at www.mtdproducts.com 2 SECTION 1: IMPORTANT SAFE OPERATION PRACTICES This symbol points out important safety instructions, which if not followed, could endanger the personal safety and/or property of yourself and others. Read and follow all instructions in this manual before attempting to operate this machine.

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