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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, brush-
covered or grass-covered land unless the engine’s exhaust system is equipped with a spark arrester meeting applicable local or st
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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 Troubleshooting ................................................ 12 Safe Operation Practices ................................... 4 Safety Labels .................................................... 13 Setup and Adjustment
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Use this page as a guide to determine slopes where you may not operate safely. Do not operate your lawn mower on such slopes. 1 Slope Gauge 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). A riding mower could overturn and cause serious injury. If operating a walk- behind mower on such a slope, it is extremely difficult to maintain your footing and you could slip, resulting in serious injury. Operate RID
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WARNING: Engine Exhaust, some of its constituents, and certain vehicle compo- nents contain or emit chemicals known to State of California to cause cancer and birth defects or other reproductive harm. 2 DANGER: This machine was built to be operated according to the rules for safe operation in this manual. As with any type of power equipment, carelessness or error on the part of the operator can result in serious injury. This machine is capable of amputating hands and feet and throwing Safe
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19. Shut the engine off and wait until the blade comes to a 6. Extinguish all cigarettes, cigars, pipes and other sources complete stop before removing the grass catcher or unclog- of ignition. ging the chute. 7. Never fuel machine indoor because flammable vapors will The cutting blade continues to rotate for a few seconds after accumulate in the area. the engine is shut off. Never place any part of the body in 8. Never remove gas cap or add fuel while engine is hot or 2 the blade area u
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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 operat- ing your mower. A 3 1. Remove any packing material which may be between upper and lower handles. Setup and a. Pull up and back on upper handle as shown in Figure 3-1. Make certain the lower handle is seated Adjustment securely into the handle mounting brackets. Do not crimp cable while lifti
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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). 3 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 Setup and the frame. See Figure 3-5. All the plastic channels except center top of bag attach from outside of Adjustment bag. c. Attach center top of bag from inside of bag. C 6. Follow steps below
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Know Your Lawn Mower Blade Control 4 Operating Your Lawn Mower 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. Figure 4-1: The main components on the mower. Gasoline is extremely flammable and the vapors Now that you have setup your lawn mower, its important to become acquainted with its controls and features. are explosive. Never fuel the machine in
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Starting Engine WARNING: Be sure no one other than the operator is standing near the lawn mower 2 while starting engine or operating mower. Never 4 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 Operating and lawn mower. Your Lawn Follow the set of instructions pertaining to your unit. Refer to engine manual for help with the e
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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. 5 • 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 Maintaining surface of the wheel with light oil. See Figure 5-1. • Lubricate the torsion spring and pivot point on the rear Your Lawn discharge door periodical
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Blade Care WARNING: When removing the cutting blade for sharpening or replacement, protect your 5 hands with a pair of heavy gloves or use a heavy rag to hold the blade. Blade Blade Adapter Maintaining Periodically inspect the blade adapter for cracks, especially if you strike a foreign object. Replace when Bell Your Lawn necessary. Follow the steps below for blade service. Washer Hex Bolt 1. Disconnect spark plug wire from spark plug. Turn Mower mower on its side making sure that the
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Remedy Cause Problem 1. Engage blade control. Engine fails to start 1. Blade control disengaged. 6 2. Connect wire to spark plug. 2. Spark plug wire disconnected. 3. Fuel tank empty or stale fuel. 3. Fill tank with clean, fresh gasoline. 4. Engine not primed (if equipped with 4. Prime engine as instructed in “Operat- primer). ing Your Lawn Mower”. Trouble 5. Clean, adjust gap, or replace. 5. Faulty spark plug. 6. Clean fuel line. 6. Blocked fuel line. Shooting 7. Engine flooded. 7. Wait a few m
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Safety Labels Found On Your Lawn Mower Safety Labels TO REDUCE THE RISK OF INJURY, DO NOT OPERATE UNLESS DISCHARGE COVER OR GRASS CATCHER IS IN ITS PROPER PLACE. IF DAMAGED, REPLACE IMMEDIATELY. MAX 15 ˚ KEEP HANDS and FEET AWAY • DO NOT MOW WHEN CHILDREN OR OTHERS ARE AROUND. AVOID SERIOUS INJURY OR DEATH • USE EXTRA CAUTION ON SLOPES. DO NOT WARNING • KEEP HANDS AND FEET AWAY FROM MOW SLOPES GREATER THAN 15 MOW ˚ ROTATING PARTS. ACROSS, NEVER UP AND DOWN. NEVER PULL MOWER CLOSE TO YOUR
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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 14 26 25 19 27 24 23 20 23 21 19 15 19 17 22 16 18 14
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Ref. Part No. Description Ref. Part No. Description 1 731-04204† Blade Control Cover 21 687-02076A Pivot Arm Assembly - LH 2 747-1161A Blade Control 687-02077A Pivot Arm Assembly - RH 8 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 .434 5 664-04011 Grass Bag Assembly 24 732-0404 Spring Lever Parts List 6 747-04080 Grass Bag Frame 25 720-0426 Height Adjustment Knob 7 749-1092A Upper Handle 26 687-02070A Pivot
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MANUFACTURER’S LIMITED WARRANTY FOR The limited warranty set forth below is given by Troy-Bilt LLC with respect e. Troy-Bilt does not extend any warranty for products sold or to new merchandise purchased and used in the United States, its posses- exported outside of the United States, its possessions and sions and territories. territories, except those sold through Troy-Bilt’s authorized channels of export distribution. “Troy-Bilt” warrants this product against defects in material and work
