For Parts Call 606-678-9623 or 606-561-4983 Safety • Assembly • Operation • Tips & Techniques • Maintenance • Troubleshooting • Parts Lists • Warranty OPERATOR’S MANUAL 21” Rotary Mower — Model Series 420 IMPORTANT READ SAFETY RULES AND INSTRUCTIONS CAREFULLY BEFORE OPERATION Warning: This unit is equipped with an internal combustion engine and should not be used on or near any unimproved forest-covered, brushcovered or grass-covered land unless the engine’s exhaust system is equipped with a spark arreste
For Parts Call 606-678-9623 or 606-561-4983 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. Table of Contents Slope Gauge........................................................ 3 Safe Operation Practices.................................... 4 Setup and Adjustment........................................ 6 Operating Your Lawn Mower...............................
For Parts Call 606-678-9623 or 606-561-4983 1 Use this page as a guide to determine slopes where you may not operate safely. Do not operate your lawn mower on such slopes. Slope Gauge 3IGHT AND HOLD THIS LEVEL WITH A VERTICAL TREE &O OR A FENCE POST OR A CORNER OF A BUILDING OT LD ALO NG D ESEN TED L I N E REPR LOPE TS A S www.mymowerparts.com WARNING Do not mow on inclines with a slope in excess of 15 degrees (a rise of approximately 2-1/2 feet every 10 feet).
For Parts Call 606-678-9623 or 606-561-4983 2 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. When you see this symbol.
For Parts Call 606-678-9623 or 606-561-4983 19. Shut the engine off and wait until the blade comes to a complete stop before removing the grass catcher or unclogging the chute. The cutting blade continues to rotate for a few seconds after the engine is shut off. Never place any part of the body in the blade area until you are sure the blade has stopped rotating. 20.
For Parts Call 606-678-9623 or 606-561-4983 3 IMPORTANT: This unit is shipped without gasoline or oil in the engine. Fill up gasoline and oil as instructed in the accompanying engine manual BEFORE operating your mower. A 1. Remove any packing material which may be between upper and lower handles. Setup and Adjustment a. Pull up and back on upper handle as shown in Figure 3-1. Make certain the lower handle is seated securely into the handle mounting brackets.
For Parts Call 606-678-9623 or 606-561-4983 3 5. Follow steps below to assemble the grass catcher (if needed). Make certain bag is turned right side out before assembling (warning label will be on the outside). a. Place bag over frame so that its black plastic side is at the bottom. A b. Slip plastic channel of grass bag over hooks on the frame. See Figure 3-5. All the plastic channels except center top of bag attach from outside of bag. Setup and Adjustment C c.
For Parts Call 606-678-9623 or 606-561-4983 4 Operating Your Lawn Mower Know Your Lawn Mower Blade Control Recoil Starter Cutting Height Adjustment Levers (one at each wheel) WARNING The blade control is a safety device. DO NOT bypass its operations. Use extreme care when handling gasoline. Gasoline is extremely flammable and the vapors are explosive. Never fuel the machine indoors or while the engine is hot or running. Extinguish cigarettes, cigars, pipes and other sources of ignition.
For Parts Call 606-678-9623 or 606-561-4983 4 Starting Engine WARNING: Be sure no one other than the operator is standing near the lawn mower while starting engine or operating mower. Never run engine indoors or in enclosed, poorly ventilated areas. Engine exhaust contains carbon monoxide, an odorless and deadly gas. Keep hands, feet, hair and loose clothing away from any moving parts on engine and lawn mower. 2 Follow the set of instructions pertaining to your unit.
For Parts Call 606-678-9623 or 606-561-4983 5 Lubrication • Lubricate pivot points on the blade control at least once a season with light oil. The blade control must operate freely in both directions. See Figure 5-1. • Lubricate the wheels at least once a season with light oil (or motor oil). If wheels are removed for any reason, lubricate surface of the pivot arm and inner surface of the wheel with light oil. See Figure 5-1.
For Parts Call 606-678-9623 or 606-561-4983 Blade Care WARNING: When removing the cutting blade for sharpening or replacement, protect your hands with a pair of heavy gloves or use a heavy rag to hold the blade. Periodically inspect the blade adapter for cracks, especially if you strike a foreign object. Replace when necessary. Follow the steps below for blade service. 1. Disconnect spark plug wire from spark plug. Turn mower on its side making sure that the air filter and the carburetor are up. 2.
For Parts Call 606-678-9623 or 606-561-4983 6 Engine fails to start Engage blade control. Connect wire to spark plug. Fill tank with clean, fresh gasoline. Prime engine as instructed in “Operating Your Lawn Mower”. Clean, adjust gap, or replace. Clean fuel line. Wait a few minutes to restart, but do not prime. Open fuel valve. See engine manual. Choke engine. See engine manual. 5. 6. 7. 8. Fuel valve (if equipped) closed. 9. Engine not choked (if equipped w/choke). 8. 9. 1. Spark plug wire loose. 2.
For Parts Call 606-678-9623 or 606-561-4983 Safety Labels Found On Your Lawn Mower 7 Safety Labels TO REDUCE THE RISK OF INJURY, DO NOT O P E R AT E U N L E S S DISCHARGE COVER OR GRASS C AT C H E R I S I N I T S P RO P E R P L AC E . I F DA M AG E D, R E P L AC E I M M E D I AT E LY. MAX 15˚ AVOID SERIOUS INJURY OR DEATH • KEEP H A N D S A N D F E E T A W AY F R O M R O TAT I N G PA R T S . • REMOVE OBJECTS THAT CAN BE THROWN BY THE BLADE IN ANY DIRECTION. WEAR SAFETY GLASSES.
For Parts Call 606-678-9623 or 606-561-4983 Model Series 420 1 2 3 6 7 5 40 34 4 39 38 8 9 37 36 10 33 32 35 11 12 31 30 29 25 13 28 19 22 26 19 23 14 25 27 23 24 20 21 19 15 19 17 22 18 14 www.mymowerparts.
For Parts Call 606-678-9623 or 606-561-4983 Ref. Part No. Description Ref. Part No. Description 21 687-02076A Pivot Arm Assembly - LH 687-02077A Pivot Arm Assembly - RH 1 731-04204† Blade Control Cover 2 747-1161A Blade Control 3 746-1130 Control Cable - 40” 22 734-04014B Wheel, 8 x 2.125 Gray Idle S-Wave 4 726-0240 Cable Tie 23 738-0507B Shoulder Screw .500 x .
For Parts Call 606-678-9623 or 606-561-4983 MANUFACTURER’S LIMITED WARRANTY FOR The limited warranty set forth below is given by Troy-Bilt LLC with respect to new merchandise purchased and used in the United States, its possessions and territories.
