This HR21K2 meets C.P.S.C. blade safety requirement for walk behind rotary power mowers. This manual covers operation and maintenance of the HONDA ROTARY MOWER HR2 1. All information in this publication is based on the latest product information available at the time of approval for printing. Honda Motor Co., Ltd. reserves the right to make changes at any time without notice and without incurring any obligation. Any powered product can be a potential source of danger if misused or improperly maintained.
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. Any other use could be dangerous.
CONTENTS .............................................................. 3 GENERAL SAFETY 4 ........................................................ COMPONENT IDENTIFICATION THECONTROLS OPERATION ............................................. .......................................................... ............................................................. TRANSPORTING/STORAGE MAINTENANCE .......................................................... TROUBLESHOOTING SPECIFICATIONS ...............
GENERAL SAFETY * Know how to stop the engine quickly and understand operation of all the controls. Never permit anyone to operate the mower without proper instruction. * The safety shield and side guard are for your protection; keep them in place at all times. * The blade is sharp and dangerous. Never put your hands or feet under the mower. Never tilt the mower to expose the blade while the engine is running.
COMPONENT IDENTIFICATION ROTO-STOP GRASS BAG HANDLE LEVER I LOCK LEVER FUEL TANK CAP RECOIL STARTER CUTTING HEIGHT ADJUSTING LEVER THROTTLE LEVER BELT COVER MUFFLER ’ S-XAM type HR21 5
DRIVE CLUTCH LEVER- c-” ANDLE HANDLE JOINT GRASS BAG ___-_-----DISCHARGE OIL FILLER CAP SIDE GUARD SAFETY SHIELD TI I -HANDLE LOCK LEVER S-XAM type 6 HR21
THE CONTROLS THROTTLE CONTROL LEVER 1. Throttle “CHOKE” “HI” “LO” “IDLE” “STOP” 2. ROTO-STOP T’o put the cutting blade into operation, press the 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.
3. Drive Clutch (S-XAM TYPE only) For self-propelled operation, push the drive clutch lever forward and hold it against the handlebar. I 1 ROTO-STOP LEVER 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 whenever the mower is’to be self-propelled.
OPERATION The HR21 may be used either with the grass bag, or without the bag as a mulching mower. The following suggestions and rules are intended to help you operate your Honda HR21 under the safest conditions possible. Be alert and exercise the same care using the mower as you would using any other power tool. * Be especially careful when mowing uneven or rough ground. The mower may tilt, exposing the blade, and hidden objects could be thrown by the blade. Keep all four wheels on the ground.
BEFOREYOUSTARTTHEMOWER 1..Check the engine oil level. p?ciEq * Engine oil is a major jktor affecting engine performance and service life. Non-detergent or vegetable oils are not recommended. * Running the engine with insufficient oil can cause serious engine damage. Use Honda-4-stroke, or an equivalent high detergent, premium quality motor oil certified to meet or exceed U.S. automobile manufacturers’ requirements for service classification SE or SF.
2. Check the fuel level. Use automotive gasoline. 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 under certain conditions. Refuel in a well ventilated area with the engine stopped. * Do not smoke or allow flames or sparks in the area where the mower is refueled or where gasoline is stored. * Be careful not to spill fuel when refueling. Fuel vapor or spilled fuel may ignite.
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 properly without adequate ventilation through the bag. Make sure the lock lever is latched securely. 4. Check the blade bolts for tightness. Torque: 4.5-5.5 kgm ( 32.5-39.8 ft lb) mmwm * To be certain that the engine will not start accidentally, remove the spark plug cap before performing this inspection. 5.
STARTING THE 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. Move the throttle to “LO” instead. 2. Turn the fuel valve “ON”.
3. Place your foot on “STEP” on the mower housing. 4. Pull the starter rope lightly until you feel compression, then pull 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”. Squeeze the ROTO-STOP to start the blade. (S-XAM TYPE) Move the shift lever to “1”. Engage the drive clutch/ROTO-STOP and the mower will move forward. For faster speeds, shift to “2” or “ 3 7,.
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. Then tighten it an additional l/8- l/4 turn with the spark plug wrench to compress the washer. 3. Move the throttle to “HI”, turn on ‘the fuel valve and repeat steps 3-5 under “Starting the Engine”.
Cutting Height Adjustment Five settings are available: l”, l-i/2”, 2”, 2-l/2”, 3“. To change blade height: 1. Stop the engine. 2. Push the adjusting lever toward the wheel and move it up or down to raise or lower the blade height. 3. Release the lever in the appropriate notch. 4. Adjust the other three wheels. Make sure all four wheels are at the same level. Inmaim * Be careful not to touch the muffler when adjusting the right front wheel height.
Grass Bag The bag is subject to wear under normal usage; frequently check for fraying and tears. Replace deteriorated 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. Removal 1. Stop the engine. Unhook the grip from the handlebars. 2. Lift the lock lever, grasp the handle and remove the bag toward the rear of the mower.
TRANSPORTING/STORAGE Transporting Turn the fuel valve OFF when transporting the mower. I I I HANDLE LOCK LEVERS HANDLE * To avoid fuel and oil spillage do not tilt the unit; spilled fuel may ignite. The handle may be folded for convenience: 1. Remove the grass bag (p. 17). 2. Push the handle lock levers down and move the handle forward until it stops. 3. Loosen the handle joints and collapse the handle as shown.
Preparation for Storage The following steps should be taken to protect the mower whenever it will be stored for longer than 30 days. NOTE: If the mower will be stored for longer than a year, first remove the spark plug and pour three tablespoonsful of clean motor oil into the cylinder. Pull the starter rope slowly two or three times to distribute the oil. Replace the plug. 1. Drain the fuel tank and carburetor into an approved gasoline container: A.
3. Pull the starter rope until it becomes hard to pull. This closes the valves and breaker points (non-CD1 models), and protects them from dust and corrosion. 4. Coat areas that may rust with a light film of oil. Cover the mower and store it on a level surface in a dry, dust free area. Removal From Storage 1. Remove the spark plug; check that it is clean and properly gapped (p. 25). Pull the starter rope several times. 2.
MAINTENANCE * To prevent accidental start-up, shut off the engine and disconnect the spark plug cap before performing any maintenance. pziEziq * Use only genuine Honda parts or their equivalent for maintenance or repair. Replacement parts which are not of equivalent quality may damage the mower. Periodic inspection and adjustment of the Honda HR21 is essential if high level performance is to be maintained. Regular maintenance will also ensure a long service life.
MAINTENANCESCHEDULE - ‘q\ Fuel tank Fuel tube 1OOOLS. (3) 20°hB.
ENGINE OIL CHANGE Drain the oil while the engine is still warm to assure rapid and complete draining. 1. Remove the filler cap/dipstick using a screwdriver as illustrated. 2. Remove the drain bolt, drain the oil, and retighten the bolt securely. 3. Refill to the “Upper” level mark with the recommeded oil (see p. 10). Tighten the cap securely to prevent leakage. rzGiE%q * Used motor oil may cause skin cancer if repeatedly left in contact with the skin for prolonged periods.
AIR CLEANER SERVICE A dirty air cleaner will restrict.air flow to the carburetor. TO prevent carburetor malfunction, service the air cleaner frequently. 1. 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. 2. Foam element: Clean in warm soapy water, rinse and allow to dry thoroughly. Or clean in high flash-point solvent and allow to dry.
SPARKPLUG Standard Plugs : P-DAM: BMR-GA(NGK)_ or W20MR-U(ND) S-XAM: BPM6A-lO(NGK) or W2OMP-UlO(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 in) for BM TYPE plugs, O.9- l.Omm (0.035-0.040 in) for BPM TYPE plugs. If adjustment is necessary, bend the side electrode carefully. 4.
BLADEREMOVALANDSHARPENING * Wear heavy gloves to protect your hands. 1. Tilt the mower so the carburetor side is up. Loosen the blade bolts to remove the blade. 2. Sharpen the blade cutting edges with a file. File the top side only. Maintain the original bevel for a fine cutting edge. File both ends evenly to maintain blade balance. NOTE : Use only a genuine HONDA replacement blade or equivalent . 3. Clean away any dirt and grass from around the blade shaft. 4. Install the blade.
THROTTLE CONTROL CABLE ADJUSTMENT 1. Move the throttle lever to “CHOKE”. 2. Push the control lever at the carburetor with your finger to check if it is positioned at the extreme right. 3. If adjustment is necessary, loosen the cable lock nut. Turn the adjusting bolt in or out as required until the lever is completely right. Tighten the lock nuts securely. 4. Start the engine and make sure the engine is stopped when moving the throttle control lever to “STOP”.
ROTO-STOP LEVER FREE PLAY 5-10mm (3/15-3/8 in) 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 nut at the lever cable and turn the adjusting bolt to increase or decrease free play. 3. Tighten the lock nuts securely. 4. After adjusting, make sure the rotary blade is stopped when releasing the ROTO-STOP lever.
DRIVE (S-XAM CLUTCH TYPE FREE PLAY 15.20mm (19/32-2502 only) in) 1. Measure free play at the top of the lever as shown; it should be between 15-20 mm (19/32-25/32 in). 2. If adjustment is necessary, loosen the clutch cable lock nut and turn the adjusting bolt to increase or decrease free play. 3. Tighten the lock nuts securely. 4. After adjusting, make sure the drive clutch operates properly; moving torward when gripping and stopping to propel1 when releasing.
NOTE: The following adjustments should be performed by an authorized Honda dealer unless the owner has the proper tools and is mechanically proficient. 1 1. Move the throttle lever to “IDLE” and start the engine. 2. Turn the throttle stop screw either in or out as required until the engine runs at 1,400 rpm.
SHIFT CONTROL CABLE ADJUSTMENT (S-XAM TYPE only) 1. Move the shift lever to “3”. 2. Remove the grass bag. Loosen the three 6 mm bolts and remove the bag opening panel. 3. Loosen the three 6 mm bolts and remove the belt cover. AG OPENING ANEL BELT COVE 4. Raise the movable driven face to move the drive belt to the smallest section of the pulley. 5. Loosen the cable lock nut and turn the adjusting bolt until there is no clearance between the contacting portions of the shift arm and tension arm. 6.
GRASS BAG ASSEMBLY FLOAT NUTS UPPER FRAME I. Work the upper frame into the grass bag. The side with two holes goes in first to match the holes in the side of the bag. ANTI-SAG ROD / 3. With the bag upside down, place the anti-sag rod in the bag and secure it to the upper frame with two screws and two washers. Install the bag grip on the rod through the slits in the bag end. 32 HR21 2. Install four float nuts onto the plastic sheet in the bottom of the bag.
LOCK HANDLE 5. Install the lock handle to the bag with two screws. 6. Install the spring on the lever with the long hook down. Slide the retaining bracket under the short hook and finger-tighten the bracket on the bag. LOCK LEVER I 7. Hook the long end of the spring on the lever and tighten the bracket securely.
TROUBLESHOOTING CHART Engine will not start 1. 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. Engine flooded (p. 15). 6. Dirty air cleaner. Hard starting or loss of power 1. Dirt in gas tank. 2. Dirty air cleaner. 3. Water in gas tank. 4. Vent in gas cap and/or carburetor clogged. Erratic operation 1. Spark plug faulty or improperly gapped (p.25). 2. Dirty air cleaner. Engine overheats 1.
SPECIFICATIONS MODEL ROTARY MOWER HR2] .................................. ENGINE .................................. GV150 Engine type ............................. Side valve, single-cylinder, forced air-cooled four-stroke gasoline engine. Displacement/Bore 144 cc (8.8 cu in)/64 x 45 mm (2.52 x 1.77 in) and stroke ............... Ignition timing ...........................
WARRANTY SERVICE Owner Satisfaction Your satisfaction and goodwill are important to your dealer and to us. All Honda warranty details are explained in the Distributor’s Limited Warranty. Normally, any problems concerning the product will be handled by your dealer’s service department. If you have a warranty problem that has not been handled to your satisfaction, we suggest you take the following action: l Discuss your problem with a member of dealership management.