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Honda HRA-21 Owner's Manual

Honda lawn mower user manual
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  • Page 3 The HRA-21 meets CPSC blade safety requirement for walkbehind rotary power mowers. This manual covers operation and maintenance of the information in this publication is based on the latest product information printing. Honda Motor Co., Ltd. reserves the right to make changes at any time without notice and without incur- ring any obligation.
  • Page 4 Thank you for purchasing a Honda Lawn Mower. If any problems occur, or if there are any questions concerning the mower, consult an authorized HONDA dealer. No part of this publication may be reproduced without written permission. The Honda rotary mower is designed to give safe and dependable service if operated according to instructions and intended use: mowing (cutting) grass, and bagging cut grass when equipped with the grass bag.

  • Page 5: Table Of Contents

    CONTENTS.. GENERAL SAFETY COMPONENT IDENTIFICATION THECONTROLS.. OPERATION TRANSPORTING/STORAGE MAINTENANCE TROUBLESHOOTING SPECIFICATIONS : ...

  • Page 6: General Safety

    GENERAL SAFETY * Know how to stop the engine quickly and under- stand operation aN rhe controls. anyone to operate the mower without strut tion. * The rear shield is for your protection; in place at all times. * The blade is sharp and dangerous. Never put your hands or feet under the mower.

  • Page 7: Component Identification

    COMPONENT IDENTIFICATION GRASS BAG HANDLE FUEL TANK CAP RECOIL STARTER AIR CLEANER PLUG CAP SPARK LEYER CUTTING HEIGHT ADJUSTING MUFFLER ROTO-STOP LEVER THROTTLE LEVER GRASS BAG ENGINE OIL DRAIN PLUG SDA Type...
  • Page 8 DRIVE CLUTCH LEVER ~HANDLE GRASS BAG GRIP OIL FILLER ,,lSC..,ARGE REAR SHIELD...

  • Page 9: Thecontrols

    CONTROLS THROTTLE CONTROL LEVER Throttle (All TYPES) “CHOKE” “HI” “LO” “IDLE” “STOP” ROTO-STOP (All TYPES) To put the cutting blade into operation, press the ROTO-STOP LEVER button on top of the ROTO-STOP lever and push the lever forward, holding it against the handlebar. The blade will stop when the ROTO-STOP lever is released.
  • Page 10 I)rive Clutch (SDA and SDAW ,TYPES) For self-propelled operation, push the drive clutch lever forward and hold it against the handlebar. The drive clutch lever holds the ROTO-STOP lever forward during self-propelled operation. The button on top of the ROTO-STOP lever must be pressed before either of these levers can be moved forward - the cutting blade must be put into operation when- ever the mower is to be self-propelled.

  • Page 11: Operation

    OPERATION The HRA21 may be used with the grass bag or dis- charge adapter. The following suggestions and rules are intended to help you operate your Honda HRA21 under the safest conditions possible. Be alert and exercise the same care using the mower as you would using any other power tool.
  • Page 12 BEFORE YOU START THE MObVER 1. Check the engine oil level. pY5V-l * Engine is a .major factor formance and service life. Non-detergent or veget- able oils are not recommended. * Running the engine with insufficient serious engine damage. Use Honda-&troke, or an equivalent gent, premium quality motor oil certified to meet or exceed U.S.
  • Page 13 2. Check the fuel level. Use regular or unleaded automotive pump octane or higher. Never use an oil/gasoline mixture or dirty gasoline. Avoid getting dirt, dust or water in the fuel tank. * Gasoline is extremely flammable and explosive un- der certain conditions.
  • Page 14 3. Check the grass bag for fraying, tears and clogged mesh. Wash the bag with water if necessary, and let it dry thoroughly. Grass will not chute proper- ly without adequate ventilation Make sure the lock lever is latched securely. 4.
  • Page 15 STARTING ENGINE * Exhaust gas contains poisonous carbon monoxide. Never run the mower in an enclosed area. Be sure to provide adequate ventilation. 1. Move the throttle lever to “CHOKE”. NOTE: Do not use “CHOKE” when the engine is warm or the air temperature is high.
  • Page 16 3. Place your foot on the “STEP” of the mower hous- ing. 4. Pull the starter rope lightly until you feel compres- sion, pull then briskly. NOTE: Do not allow the rope to snap back; return it by hand. 5. After the engine warms up, move the throttle lever to “HI”.
  • Page 17 Flooded Engine If the engine won’t start after several pulls on the starter rope the engine is probably flooded. To clear a flooded engine: 1. Move the throttle lever to “STOP” and turn off the fuel valve. 2. Remove and dry the spark plug. When re-installing the plug, thread it in by hand until it seats.
  • Page 18 Cutting Height Adjustment Six settings are available: S/8”, l”, l-1/2”,2”,2-1/2”,3”. To change blade height: 1. Stop the engine. 2. Push the adjusting lever t&ward the wheel and move it up or down to raise or lower the blade height. 3. Release the lever in the appropriate notch. 4.
  • Page 19 Grass Bag The bag is subject to wear under normal usage; fre- quently check for fraying and tears. Replace deterio- rated bags only with Honda replacement bags or equivalent. When the bag needs cleaning, wash it with water and make sure it is dry before using it. Clogged mesh will result in poor grass chuting and a wet bag will clog quickly.

  • Page 20: Transporting/Storage

    TRANSPORTING/STORAGE Transporting Turn fuel valve when mower. * To avoid fuel and oil spillage do not tilt the unit; spilled fuel may ignite. Preparation for Storage The following mower whenever it will be stored for longer than 30 transporting days. 1.
  • Page 21 Loosen the carburetor drain bolt to drain the carburetor. C. Retighten the drain bolt, connect the fuel tube and turn the fuel valve OFF. * Gasoline is extremely flammable and explosive un- der certain conditions. Do not smoke or allow flames or sparks in the area.
  • Page 22 3. Pull the starter rope until resistance is felt. This closes the valves and helps to protect bustion chamber from corrosion. 4. Remove dirt and debris from mower housing. Clean the mower thoroughly. areas that may rust with a rust-resistant paint, or coat with a light film of oil.

  • Page 23: Maintenance

    MAINTENANCE prevent accidental start-up, shut off the engine and disconnect the spark plug cap before perform- ing any maintenance. * Use only genuine Honda parts or their equivalent maintenance or repair. which are not of equivalent quality may damage the mower. Periodic inspection and adjustment HRA2 1 are essential it high level performance is to be...
  • Page 24 MAINTENANCESCHEDULE Regular Service Period Perform at every indicated month or operating hour intervals, whichever occurs first. Check level 3ngine oil Change Check 4ir cleaner element Check Gel strainer Check spark plug Clean-Adjust 31ade bolts (Tightness) Check brass bag Check Throttle cable Adjust Drive belt Inspection...
  • Page 25 ENGINE CHANGE Drain the oil while the engine is still warm to assure rapid and complete draining. 1. Remove the tiller cap/dipstick as illustrated. 2. Remove the dram bolt, drain the oil, and retighten the bolt securely. 3. Refill to the “Upper” level mark with the recom- meded oil (see p.
  • Page 26 AIR CLEANER SERVICE A dirty air cleaner will restrict air flow to the carbu- retor. To prevent carburetor malfunction, air cleaner frequently. l.Remove the wing nuts and the air cleaner cover. Remove the elements and separate them. Carefully check both elements for holes or tears and replace if damaged.
  • Page 27 SPARKPLUG Standard Plugs: BMR-6A (NGK) or W20MR-U (ND) 1. Disconnect the cap and remove the spark plug. 2. Visually inspect the plug. Discard the plug if it is heavily deposited or if the insulator is cracked or chipped. 3. Measure the plug gap with a wire-type feeler gauge; it should be 0.6-0.7 mm (0.024-0.028 justment is necessary, bend the side electrode care- fully.
  • Page 28 BLADE REMOVAL AND SHARPENING * Wear heavy gloves CO protect your hands. Before tilting the mower, remove the spark plug cap. 1. Tilt the mower so the carburetor side is up. Loosen the blade bolts to remove the blade. * Never tilt the mower so the carburetor side is down. It will result in hard starting.
  • Page 29 THROTTLE CONTROL CABLE 1. With the throttle lever in the “CHOKE” the carburetor control lever should be pulled all the way to the right. Push the control lever with your finger to check whether it is all the way to the right.
  • Page 30 ROTO-STOP LEVER FREE PLAY (All TYPES) 1. Measure free play at the tip of the lever as shown; it should be between 5 - 10 mm (3/ 16 - 3/8 in). 2. If adjustment is necessary, loosen the lock nuts and turn them to run the adjuster up or down as re- quired.
  • Page 31 DRIVE CLUTCH FREE PLAY (SDA and SDAW TYPES) 1. Measure free play at the top of the lever as shown; it should be between 7- 12 mm (9132-l 5132 in>. 2. If adjustment is necessary, loosen the lock nuts and turn them to run the adjuster up or down as required.
  • Page 32 NOTE: The following adjustments should be performed by an authorized Honda dealer unless the owner has the proper tools and is mechanically 1. Move the throttle lever to “IDLE” engine. 2. Turn the throttle stop screw either in or out as required until the engine runs at 1,400 rpm.
  • Page 33 RASS BAG ASSEMBLY 3. Turn the bag upside down. Install frame with the lipped edge forward and secure it with two screws as shown. 2. Place the anti-sag rod in the bag as shown and secure its upper sides to the upper frame with two nuts.
  • Page 34 6. Install the grass bag grip by putting its ends in 5. Install the grass bag handle onto the upper frame the pivot hole on the rear end of the anti-sag rod. with two cap nuts as shown.

  • Page 35: Troubleshooting

    TROUBLESHOOTING CHART Engine will not start Hard starting or loss of power Erratic operation Engine overheats Excessive vibration I. No fuel. 2. Throttle lever in “STOP” position. 3. Spark plug wire loose or disconnected. 4. Spark plug faulty or improperly gapped (p. 25). 5.

  • Page 36: Specifications

    SPECIFICATIONS MODEL ... ENGINE ... Engine type ... Displacement/Bore and stroke ... Ignition timing ... Ignition system ... Engine oil capacity ... Fuel tank capacity ... Spark plug ... FRAME Dimensions (Length x Width x Height) ..1,585 x 540 x 975mm (62.4 x 21.3 x 38.4in) Dry weight .
  • Page 40 When you write or call, please provide the following information: • Model and serial numbers • Name of the dealer who sold the Honda power equipment to you • Name and address of the dealer who services your equipment •...

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