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Yard-Man 503 Operator's Manual

22” rotary mowers
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Operator's Manual
22" Rotary Mowers
Model 503
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 forest-
covered, 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). 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.
769-00904.fm
(10/03)

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Summary of Contents for Yard-Man 503

  • Page 1 Operator’s Manual 22” Rotary Mowers Model 503 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 forest- covered, 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).

  • Page 2: Table Of Contents

    Content Important Safe Operation Practices Slope Gauge Assembling Your Lawn Mower Know Your Lawn Mower Operating Your Lawn Mower This Operator’s Manual is an important part of your new lawn mower. 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.

  • Page 3: Important Safe Operation Practices

    SECTION 1: IMPORTANT SAFE OPERATION PRACTICES WARNING: 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. Failure to comply with these instructions may result in personal injury.

  • Page 4: Slope Operation

    18. If the equipment should start to vibrate abnormally, stop the engine and check immediately for the cause. Vibration is generally a warning of trouble. 19. Shut the engine off and wait until the blade comes to a complete stop before removing the grass catcher or unclogging the chute.
  • Page 5 General Service: Never run an engine indoors or in a poorly ventilated area. Engine exhaust contains carbon monoxide, an odorless and deadly gas. Before cleaning, repairing, or inspecting, make certain the blade and all moving parts have stopped. Disconnect the spark plug wire and ground against the engine to prevent unintended starting.

  • Page 6: Slope Gauge

    SECTION 2: SLOPE GAUGE Use this page as a guide to determine slopes where you may not operate safely. Do not operate your lawn mower on such slopes.

  • Page 7: Assembling Your Lawn Mower

    SECTION 3: ASSEMBLING YOUR LAWN MOWER This unit is shipped without gasoline or oil IMPORTANT: in the engine. Be certain to service engine with gasoline and oil as instructed in the separate engine manual before operating your mower. NOTE: Reference to right or left hand side of the mower is observed from the operating position.
  • Page 8 Installing Front Wheels • Place the front of the mower deck on raised blocks. • Remove lock nut from pivot arm assembly, slide wheel onto pivot arm assembly and secure with lock nut. See Figure 6. • Assemble the other side in the same manner. •...

  • Page 9: Know Your Lawn Mower

    This unit is shipped without gasoline or oil IMPORTANT: in the engine. Be certain to service engine with gasoline SECTION 4: KNOW YOUR LAWN MOWER Read this operator’s manual and safety rules before operating your lawn mower. Compare the illustration in Figure 10 with your lawn mower to familiarize yourself with the location of various controls and adjustments.

  • Page 10: Making Adjustments

    • Your lawn mower may be equipped with a constant speed throttle, which is set at full throttle for best performance. • Stand behind the mower and squeeze the blade control handle against the upper handle. • Grasp recoil starter handle and pull rope out slowly until engine reaches the start of compression cycle (rope will pull slightly harder at this point).

  • Page 11: Maintaining Your Lawn Mower

    SECTION 7: MAINTAINING YOUR LAWN MOWER Customer Responsibilities MAINTENANCE SCHEDULE Lubricate Wheels Lubricate Blade Control Clean Deck Blade Care Check Oil Change Oil Replace Air Filter Clean Engine Check Spark Plug Check Spark Arrester (if any) General Recommendations • Always observe safety rules when performing any maintenance.
  • Page 12 Maintenance NOTE: When tipping the unit or emptying the fuel tank keep the air cleaner side of engine up. Never tip the mower more than 90 degrees and do not leave the mower tipped for any length of time. Oil can drain into the upper part of the engine causing a starting problem.

  • Page 13: Trouble Shooting

    SECTION 8: TROUBLESHOOTING Problem Engine fails to start 1. Blade control handle disengaged. 2. Spark plug wire disconnected. 3. Fuel tank empty or stale fuel. 4. Blocked fuel line. 5. Faulty spark plug. 6. Engine flooded Engine runs erratic 1. Spark plug wire loose. 2.

  • Page 14: Illustrated Parts List

    SECTION 9: PARTS LIST FOR MODEL 503 11† †If Equipped...
  • Page 15 Model 503 Ref. Part No. Part Description 747-1161A Blade Control Handle 749-1092A Upper Handle 746-0946 Blade Control Cable - 48.25” 710-1205 Eye Bolt 720-0279 Wing Nut 720-0284 Wing Nut 736-0451 Shoulder Washer.320 ID x.93 OD 710-1174 Carriage Bolt 5/16-18 x 2.0...

  • Page 16: Warranty

    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” warrants this product against defects in material and workmanship for a period of two (2) years commencing on the date of original purchase and will, at its option, repair or replace, free of charge, any part found to be defective in...

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