HITACHI RB 24EAP - Handheld Blower 23.9 cc Manual

HITACHI RB 24EAP - Handheld Blower 23.9 cc Manual

Also See for RB 24EAP:


HITACHI RB 24EAP - Handheld Blower 23.9 cc Manual


IMPROPER OR UNSAFE use of this power tool can result in death or serious bodily injury!
This manual contains important information about product safety. Please read and understand this manual BEFORE operating the power tool. Please keep this manual available for other users and owners before they use the power tool. This manual should be stored in safe place.


NOTE: Some units do not carry them.

The following show symbols used for the machine. Be sure that you understand their meaning before use.

It is important that you read, fully understand and observe the following safety precautions and warnings. Careless or improper use of the unit may cause serious or fatal injury.

warning Read, understand and follow all warnings and instructions in this manual and on the unit.

Always wear eye, head and ear protectors when using this unit.

Keep hands off from rotating fan.

burn hazard Hot surfaces; The muffl er and surrounding cover may become extremely hot. Always keep clear of exhaust and muffl er area, otherwise serious personal injury may occur.

Keep all children, bystanders and helpers 50 ft (15 m) away from the unit. If anyone approaches you, stop the engine immediately.

Use anti-slip and sturdy footwear.


Since this manual covers several models, there may be some diff erence between pictures and your unit. Use the instructions that apply to your unit.


  1. Fuel cap
  2. Throttle trigger
  3. Starter handle
  4. Fuel tank
  5. Carburetor
  6. Air cleaner
  7. Handle
  8. Suspension eyelet
  9. Ignition switch
  10. Straight pipe
  11. Conic pipe
  12. Guard net
  13. Spark plug
  14. Chock knob
  15. Priming bulb
  16. Recoil starter
  17. Handling instructions


Operator safety

  • A dust filter mask should be worn during operation.
  • Always wear a safety face shield or goggles.
  • Always wear heavy, long pants, boots and gloves. Do not wear loose clothing, jewelry, short pants, sandals or go barefoot. Secure hair so it is above shoulder length.
  • Do not operate this tool when you are tired, ill or under the influence of alcohol, drugs or medication.
  • Never let a child or inexperienced person operate the machine.
  • Wear hearing protection. Pay attention to your surroundings. Be aware of any bystanders who may be signaling a problem. Remove safety equipment immediately upon shutting off engine.
  • Wear head protection.
  • Never start or run the engine inside a closed room or building. Breathing exhaust fumes can kill.
  • Keep handles free of oil and fuel.
  • Keep hands away from moving part or heated area.
  • Do not grab or hold the unit by the blow pipe.
  • When the unit is turned off make sure the engine has stopped before the unit is set down.
  • When operation is prolonged, take a break from time to time so that you may avoid possible Hand-Arm Vibration Syndrome (HAVS) which is caused by vibration.

  • Antivibration systems do not guarantee that you will not sustain Hand-Arm Vibration Syndrome (HAVS) or carpal tunnel syndrome. Therefore, continual and regular users should monitor closely the condition of their hands and fingers. If any symptoms of the above appear, seek medical advice immediately.
  • If you are using any medical electric/ electronic devices such as a pacemaker, consult your physician as well as the device manufacturer prior to operating any power equipment.

Unit/machine safety

  • Inspect the entire unit/machine before each use. Replace damaged parts. Check for fuel leaks and make sure all fasteners are in place and securely tightened.
  • Replace parts that are cracked, chipped or damaged in any way before using the unit/ machine.
  • Make sure the safety guard is properly attached.
  • Keep others away when making carburetor adjustments.
  • Use only accessories as recommended for this unit/machine by the manufacturer.

Never modify the unit/machine in any way. Do not use your unit/machine for any job except that for which it is intended.

Fuel safety

  • Empty the fuel tank before storing the tool. It is recommended that the fuel be emptied after each use. If fuel is left in the tank, store so fuel will not leak.
  • Fuel contains highly flammable and it is possible to get the serious personal injury when inhaling or spilling on your body. Always pay attention when handling fuel. Always have good ventilation when handling fuel inside building.
  • Mix and pour fuel outdoors and where there are no sparks or flames.
  • Use a container approved for fuel.
  • Do not smoke or allow smoking near fuel or the unit/machine or while using the unit/machine.
  • Wipe up all fuel spills before starting engine.
  • Move at least 10 ft (3 m) away from fueling site before starting engine.
  • Stop engine before removing fuel cap.
  • Store unit/machine and fuel in area where fuel vapors cannot reach sparks or open flames from water heaters, electric motors or switches, furnaces. etc.

Fuel is easy to ignite or get explosion or inhale fumes, so that pay special attention when handling or filling fuel.

Blowing safety

  • Operate unit/machine only at reasonable hours-not early in the morning or late at night when people might be disturbed. Comply with times listed in local ordinances. Usual recommendations are 9:00 a.m. to 5:00 p.m., Monday through Saturday.
  • Never direct discharge of air toward bystanders nor allow anyone near the area of operation. Use care in directing discharge to avoid glass enclosures, automobiles, etc.
  • Stay alert for uneven sidewalks, holes in terrain or other unstable condition when using the tool.
  • Take all possible precautions when leaving the tool unattended such as stopping the engine.
  • Never operate the tool without guards, blow pipes or other protective device in place. (If so equipped.)
  • Keep others including children, animals, bystanders and helpers outside the 50 ft (15 m) hazard zone. Stop the engine immediately if you are approached.
  • Always keep the engine on the right side of your body.
  • Keep firm footing and balance. Do not overreach.
  • Keep all parts of your body away from the muffler.
  • Always carry a first-aid kit when operating any power equipment.
  • Never start or run the engine inside a closed room or building and/or near inflammable liquids. Breathing exhaust fumes can kill.

Maintenance safety

  • Maintain the unit/machine according to recommended procedures.
  • Disconnect the spark plug before performing maintenance except for carburetor adjustments.
  • Keep others away when making carburetor adjustments.
  • Use only genuine Hitachi replacement parts as recommended by the manufacturer.

Do not disassemble the recoil starter. You may get a possibility of personal injury with recoil spring.

Transport and storage

  • Carry the unit/machine by hand with the engine stopped and the muffler away from your body.
  • Allow the engine to cool, empty the fuel tank, and secure the unit/machine before storing or transporting in a vehicle.
  • Empty the fuel tank before storing the unit/ machine. It is recommended that the fuel be emptied after each use. If fuel is left in the tank, store so fuel will not leak.
  • Store unit/machine out of the reach of children.
  • Clean and maintain the unit carefully and store it in a dry place.
  • Make sure engine switch is off when transporting or storing.

If situations occur which are not covered in this manual, take care and use common sense. Contact your Hitachi dealer if you need assistance. Pay special attention to statements preceded by the following words:

Indicates a strong possibility of severe personal injury or loss of life, if instructions are not followed.

Indicates a possibility of personal injury or equipment damage, if instructions are not followed.

NOTE: Helpful information for correct function and use.


Engine Size (cu. in.) 1.46 (23.9 ml)
Spark Plug Champion CJ6
Dry Weight (Ibs) 8.6 (3.9 kg)
Fuel Tank Capacity (fl. oz) 17.6 (0.52 l)
Sound pressure level By ANSI 69* 2
LpA (dB (A)) by ISO22868 By CEN 87* 1
Uncertainty (dB (A)) 1.8* 1
Sound power level Lw measured (dB (A)) by ISO22868 107* 1
Sound power level LwA (dB (A)) by 2000/14/EC 109* 1
Vibration level (m/s 2 ) by ISO22867 12
Uncertainty (m/s 2 ) 1.0

*1: Equivalent noise level/vibration level are calculated as the time-weighted energy total for noise/vibration levels under various working conditions with the following time distribution: 1/7 Idle, 6/7 racing.

*2: ANSI B175.2

* All data subject to change without notice.


Blow pipes to main body

Inspect the main body and accessories. Connect straight pipe (1) securely. Align projection (2) in straight pipe with groove (3) on blower housing and slide the pipe into the blower housing. Rotate the pipe clockwise to lock it into place. (Fig. 1)

Blow pipes to main body

Conic pipe to straight pipe

  • Align groove (5) on the conic pipe (6) and projection (4) on straight pipe (1) and rotate the conic pipe in place. (Fig. 2)

Conic pipe to straight pipe


Fuel (Fig. 3)


  • This unit is equipped with a two-stroke engine. Always run the engine on fuel, which is mixed with oil. Provide good ventilation, when fueling or handling fuel.
  • Fuel contains highly flammable and it is possible to get the serious personal injury when inhaling or spilling on your body. Always pay attention when handling fuel. Always have good ventilation when handling fuel inside building.


  • Always use branded 89 octane unleaded gasoline.
  • Use genuine two-cycle oil or use a mix between 25:1 to 50:1, please consult the oil bottle for the ratio or Hitachi dealer.
  • If genuine oil is not available, use an anti-oxidant added quality oil expressly labeled for air-cooled 2-cycle engine use (JASO FC GRADE OIL or ISO EGC GRADE). Do not use BIA or TCW (2-stroke water-cooling type) mixed oil.
  • Never use for four-stroke engine oil or waste oil.
  • Always mix fuel and oil in a separate clean container.

Always start by filing half the amount of fuel, which is to be used. Then add the whole amount of oil. Mix (shake) the fuel mixture. Add the remaining amount of fuel. Mix (shake) the fuel-mix thoroughly before filling the fuel tank.


  • Always shut off the engine and let it cool for a few minutes before refueling.
  • Slowly open the fuel tank, when filling up with fuel, so that possible over pressure disappears.
  • Tighten the fuel cap carefully, after fueling.
  • Always move the unit at least 10 ft (3 m) from the fueling area before starting.
  • Do not smoke and/or allow flames or sparks near fuel when handling or filling fuel.
  • Always wash any spilled fuel from clothing immediately with soap.
  • Be sure to check for any fuel leaking after refueling.

Before fueling, clean the tank cap area carefully, to ensure that no dirt falls into the tank. Make sure that the fuel is well mixed by shaking the container, before fueling.


Do not start if the pipe and guard net is obstructed.

  1. Check the switch (7) to ON position. (Fig. 4)
    Starting Fig. 4

    * Push priming bulb (8) several times so that fuel flows through the bulb or return pipe (9). (Fig. 5)

    Starting Fig. 5
  2. Set choke lever to CLOSED position. (Fig. 6)
    Starting Fig. 6
  3. Pull recoil starter briskly, taking care to keep the handle in your grasp and not allowing it to snap back. (Fig. 7)
    Starting Fig. 7
  4. When you hear the engine want to start, return choke lever to RUN position (open). Then pull recoil starter briskly again.
    • Never start or run the engine inside a closed room or building and/or near the inflammable liquid. Breathing exhaust fumes can kill.
    • Do not allow the rope to snap back in and always hold the unit firmly.
      If engine does not start, repeat procedures from 2 to 4.
  5. After starting engine, allow the engine about 2–3 minutes to warm up before subjecting it to any load.

* If the engine stops and is hard to restart straightaway, allow it to cool before trying again.

Operating blower

  • A low speed should be used to blow leaves and dry grass.
  • A medium speed should be used to clean wet leaves and grass.
  • A high speed should be used when moving gravel, dirt or other heavy materials. (Fig. 8)

Operating blower

  • Do not direct discharge of air toward people or pet.
  • The unit should be operated in a well ventilated area.
  • Never perform assembly or disassembly procedures with engine running or serious personal injury may result.
  • Never touch muffler, spark plug, or other metallic parts while engine is in running or immediately after shutting off engine.

This blower has been designed and adjusted to be used with all blowing pipes attached. It must never be operated without the straight pipe, and blow head.


Decrease engine speed and run at an idle for a few minutes, then turn off ignition switch and keep the pressed until the engine comes to a complete stop. (Fig. 9)




Carburetor adjustment

In the carburetor, fuel is mixed with air. When the engine is test run at the factory, the carburetor is basically adjusted. A further adjustment may be required, according to climate and altitude. The carburetor has one adjustment possibility: T = Idle speed adjustment screw. (Fig. 10)

Carburetor adjustment

Idle speed adjustment (T)

Check that the air filter is clean. If adjustment is required, turn IDLE speed Adjustment Screw (T) close (clockwise) to increase engine speed, open (counterclockwise) to decrease engine speed. Standard Idle rpm is 2800-3200rpm.



Air filter

The air filter must be cleaned from dust and dirt in order to avoid:

  • Carburetor malfunctions
  • Starting problems
  • Engine power reduction
  • Unnecessary wear on the engine parts
  • Abnormal fuel consumption

Remove the air cleaner cover by pushing and pulling back the tab on the top. Clean the air filter daily or more often if working in exceptionally dusty areas. (Fig. 11)

Air filter

Cleaning the air filter

Open the air filter cover and the filter. Rinse it in warm soap suds. Check that the filter is dry before reassembly. An air filter that has been used for some time cannot be cleaned completely. Therefore, it must regularly be replaced with a new one. A damaged filter must always be replaced.

Fuel filter

Drain all fuel from fuel tank and pull fuel filter line from tank. Pull filter element out of holder assembly and rinse element in warm water with detergent. Rinse thoroughly until all traces of detergent are eliminated. Squeeze, do not wring, away excess water and allow element to air dry. (Fig. 12)

Fuel filter

NOTE: If element is hard due to excessive dirt buildup, replace it.

Spark plug

The spark plug condition is influenced by:

  • An incorrect carburetor setting
  • Wrong fuel mixture (too much oil in the gasoline)
  • A dirty air filter
  • Hard running conditions (such as cold weather)

These factors cause deposits on the spark plug electrodes, which may result in malfunction and starting difficulties. If the engine is low on power, difficult to start or runs poorly at idling speed, always check the spark plug first. If the spark plug is dirty, clean it and check the electrode gap. Re-adjust if necessary. The correct gap is 0.024˝ (0.6 mm). The spark plug should be replaced after about 100 operation hours or earlier if the electrodes are badly eroded. (Fig. 13)

Spark plug

NOTE: In some areas, local law requires using a resistor spark plug to suppress ignition signals. If this machine was originally equipped with resistor spark plug, use same type of spark plug for replacement.

Maintenance schedule

Below you will find some general maintenance instructions. For further information please contact your Hitachi dealer.

Daily maintenance

  • Clean the exterior of the unit.
  • Check the dust cover for damage or cracks. Change the cover in case of impacts or cracks.
  • Check that nuts and screws are sufficiently tightened.

Weekly maintenance

  • Check the starter, especially the cord.
  • Clean the exterior of the spark plug.
  • Remove the spark plug and check the electrode gap. Adjust it to 0.024˝ (0.6 mm), or change the spark plug.
  • Clean the air filter.

Monthly maintenance

  • Rinse the fuel tank with gasoline, and clean fuel filter.
  • Clean the exterior of the carburetor and the space around it.

Quarterly maintenance

  • Clean the cooling fins on the cylinder.
  • Clean the fan and the space around it.
  • Clean the muffler of carbon.

Cleaning of cylinder fins, fan and muffler shall be done by a Hitachi Authorized Service Center.

NOTE: When ordering the parts to your nearest dealer, please use the item No. showing on the parts breakdown section in this instruction.


Parts Step 1Parts Step 2

Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer, birth defects or other reproductive harm. Some examples of these chemicals are:

  • Lead from lead-based paints,
  • Crystalline silica from bricks and cement and other masonry products, and
  • Arsenic and chromium from chemically-treated lumber.

Your risk from these exposures varies, depending on how often you do this type of work. To reduce your exposure to these chemicals: work in a well ventilated area, and work with approved safety equipment, such as those dust masks that are specially designed to fi lter out microscopic particles.

Issued by
Hitachi Koki Co., Ltd.
Shinagawa Intercity Tower A, 15-1, Konan 2-chome,
Minato-ku, Tokyo 108-6020, Japan

Distributed by
Hitachi Koki U.S.A., Ltd.
3950 Steve Reynolds Blvd.
Norcross, GA 30093
Hitachi Koki Canada Co.
450 Export Blvd. Unit B,
Mississauga ON L5T 2A4
Hitachi Power Tools de Mexico, S. A. de C. V
Francisco Petrarca No. 239 Local A
Col. Chapultepec Morales C. P. 11570
Mexico, D. F.



Hitachi RB 24EAP blower carburetor repair video

Documents / Resources

Download manual

Here you can download full pdf version of manual, it may contain additional safety instructions, warranty information, FCC rules, etc.

Download HITACHI RB 24EAP - Handheld Blower 23.9 cc Manual


Table of Contents