RedMax HB281 Handheld Blower Instruction Manual

RedMax HB281 Handheld Blower

Product Information

Specifications

• Model: HB281
• Language: English (with translations available)
• Engine Type: Two-stroke engine
• Product Weight: 125B28HV

Product Usage Instructions

Introduction

The operator’s manual provides detailed information on the product. It includes safety instructions, assembly guidelines, operation procedures, maintenance tips, technical data, and accessories information.

Safety

It is crucial to follow all safety instructions provided in the manual to avoid injury or damage. Always wear approved protective gear like hearing protection, eye protection, dust mask, and gloves when operating the blower.

Assembly

Follow the assembly instructions carefully to ensure proper setup of the blower. Check that all parts are securely attached and in working order before operation.

Operation

Operate the blower following the outlined procedures in the manual. Pay attention to throttle control, speed adjustments, and safety features like the stop switch and muffler. Keep a safe distance from the impeller and do not allow children near the product.

Maintenance

Regular maintenance is essential for optimal performance. Clean the air filter, inspect carburetor adjustment screws, and check for any loose parts. Refer to the manual for specific maintenance schedules and tasks.

FAQ

• What type of engine does the blower have?
  • The blower is equipped with a two-stroke engine for efficient operation.
• How should I handle the muffler while using the blower?
  • Avoid touching the hot muffler during and after operation to prevent burns. Ensure it has cooled down before any maintenance tasks.

Introduction

Operator’s manual

The initial language of this operator’s manual is English. Operator’s manuals in other languages are translations from English.

Overview

(Fig. 1)

1. Throttle trigger
2. STOP switch
3. Speed control
4. Fan housing
5. Fuel Tank Cap
6. Air filter
7. Choke
8. Primer bulb
9. Inlet cover
10. Standard nozzle
11. High-velocity nozzle
12. Blower tube
13. Tube clamp bolt
14. Tube clamp nut
15. Muffler
16. Ground wire
17. Starter handle
18. Starter device
19. Carburetor adjustment screws
20. Operator’s manual
21. Two-stroke engine oil

Symbols on the product

• (Fig. 2) Warning
• (Fig. 3) Read this manual
• (Fig. 4) Use approved hearing protection
• (Fig. 4) Use approved eye protection
• (Fig. 4) Use approved dust mask
• (Fig. 5) Use approved protective gloves
• (Fig. 6) The product can cause objects to eject, which can cause damage to the eyes
• (Fig. 7) Do not go near the impeller as it turns
• (Fig. 8) Do not let a child near the product
• (Fig. 9) Make sure that long hair is put up above your shoulders
• (Fig. 10) Safe distance

Note: Other symbols/decals on the product refer to certification requirements for other commercial areas.

Product damage

We are not responsible for damages to our product if:

• the product is incorrectly repaired.
• the product is repaired with parts that are not from the manufacturer or not approved by the manufacturer.
• the product has an accessory that is not from the manufacturer or not approved by the manufacturer.
• the product is not repaired at an approved service center or by an approved authority.

Safety

Safety definitions

The definitions below give the level of severity for each signal word.

WARNING: Injury to persons.

CAUTION: Damage to the product.
Note: This information makes the product easier to use.
General safety instructions

WARNING: Read the warning instructions that follow before you use the product.

• Use the product correctly. Injury or death is a possible result of incorrect use. Only use the product for the tasks found in this manual. Do not use the product for other tasks.
• Obey the instructions in this manual. Obey the safety symbols and the safety instructions. If the operator does not obey the instructions and the symbols, injury, damage or death is a possible result.
• Do not discard this manual. Use the instructions to assemble, to operate and to keep your product in good condition. Use the instructions for correct installation of attachments and accessories. Only use approved attachments and accessories.
• Do not use a damaged product. Obey the maintenance schedule. Only do the maintenance work that you find an instruction about in this manual. An approved service center must do all other maintenance work.
• This manual cannot include all situations that can occur when you use the product. Be careful and use your common sense. Do not operate the product or do maintenance on the product if you are not sure about of the situation. Speak to a product expert, your dealer, service agent or approved service center for information.
• Disconnect the spark plug cable before you assemble the product, put the product into storage or do maintenance.
• Do not use the product if it is changed from its initial specification. Do not change a part of the product without approval from the manufacturer. Only use parts approved by the manufacturer. Injury or death is a possible result of incorrect maintenance.
• Do not breathe in the fumes from the engine. Long-term inhalation of the engine’s exhaust fumes is a health risk.
• Do not start the product indoors or near flammable material. The exhaust fumes are hot and can contain a spark that can start a fire.
• Not sufficient airflow can cause injury or death because of asphyxiation or carbon monoxide.
• When you use this product the engine makes an electromagnetic field. The electromagnetic field can cause damage to medical implants. Speak to your physician and medical implant manufacturer before you operate the product.
• Do not let a child operate the product. Do not let a person without knowledge of the instructions operate the product.
• Make sure that you always monitor a person, with decreased physical capacity or mental capacity, that uses the product. A responsible adult must be there at all times.
• Lock the product in an area that children and unapproved persons cannot access.
• The product can eject objects and cause injuries. Obey the safety instructions to decrease the risk of injury or death.
• Do not go away from the product when the engine is on.
• The operator of the product is responsible if an accident occurs.
• Make sure that parts are not damaged before you use the product.
• Make sure that you are at a minimum 15 m (50 ft) away from other persons or animals before you use the product. Make sure that persons in the adjacent area know that you will use the product.
• Refer to national or local laws. They can prevent or decrease the operation of the product in some conditions.
• Do not use the product if you are fatigued or influenced by alcohol, drugs or medicine. They can have effects on your vision, alertness, coordination or judgment.

Vibration safety

This product is for occasional operation only. Continuous or regular operation of the product can cause “white finger” or equivalent medical problems from vibrations. Examine the condition of your hands and fingers if you operate the product continuously or regularly. If your hands or fingers have discolouration, have pain, tingle, or are numb, stop work and speak to a physician immediately. Safety instructions for operation of the blower

• Use the product only for blowing or removal of leaves and other debris on the ground.
• Do not operate the product when you are tired, ill, or have used alcohol, drugs or medicine.
• Do not let bystanders or animals to be less than 15 m (50 ft) from the operator.
• The product can eject objects at high speed that can ricochet and hit the operator. This can cause eye damage.
• Do not point the blower nozzle in the direction of persons or animals.
• Make sure that long hair is put above your shoulders.
• Stop the engine before you assemble or disassemble the accessories or other components.
• Do not operate the product without the guard.
• Do not operate the product if there are persons in the work area. Stop the product if a person goes into the work area.
• Do not operate the product in a space with unsatisfactory airflow. If the airflow is not sufficient, it can cause injury or death because of asphyxiation or carbon monoxide.
• The muffler is very hot while the product is on, after it stops and when it runs at idle speed. Be careful near flammable materials and flammable fumes.
• Do not touch the inlet cover area. Keep jewelry and loosely hanging clothing away from the inlet area.
• Always keep correct footing and operate the product only on safe and level surfaces. Slippery or unstable surfaces, such as ladders, can cause a loss of balance or control.
• Do not operate the product in a high area, such as on a roof.
• Secure the product during transport.
• Operate the product only at the recommended hour. Obey the local regulations. Usual recommendations are 9:00 a.m. to 5:00 p.m. Monday through Saturday.
• Operate the product at the lowest possible throttle to do the work.
• Make sure that you do not fall when you use the product. Do not tilt when you operate the product.
• Make sure that the product is in good condition before operation, especially the muffler, air intake and air filter.
• Use a rake or a broom to loosen ground debris before operation of the product.
• If the work area is dirty, spray it with a hose.
• Use the product as an alternative to a hose to save water.
• Blow debris safely. Look out for children, animals, open windows or vehicles.
• Do not point the product at easily damaged plants.
• Do not blow air in the direction of objects such as walls, large rocks, vehicles and fences.
• If you do work at inner corners blow from the corner and into the centre of the work area. If not, debris can hit your face and cause eye injury.
• Use the full nozzle extension to keep the air stream near the ground.
• It is necessary that bystanders wear eye protection.
• Dispose of the debris in the waste receptacles after use of the product.

Personal protective equipment

• Always use the correct personal protective equipment when you operate the product. The personal protective equipment does not erase the risk of injury. The personal protective equipment decreases the grade of injury if an accident occurs.
• Always use an approved eye protection while you operate the product.
• Do not operate the product with bare feet or with open shoes. Always use heavy-duty slip-resistant boots.
• Wear heavy, long pants.
• If it is necessary, use approved protective gloves.
• Use a helmet if it is possible that objects fall on your head.
• Always use approved ear protection while you operate the product. Noise for a long period can cause noise-induced hearing loss.
• Always use an approved dust mask while you operate the product in dusty environments.
• Make sure that you have a first aid kit near.

Protective devices on the product

• Make sure that you regularly do the maintenance to the product.
• The life of the product increases.
• The risk of accidents decreases. Let an approved dealer or an approved service center regularly examine the product to do adjustments or repairs.
• Do not use a product with damaged protective equipment. If the product is damaged, speak to an approved service centre.

Stop switch

Start the engine. Make sure that the engine stops when you move the stop switch to the stop position. (Fig. 11)

Muffler

WARNING: Do not touch the muffler if it is hot. The muffler is very hot while the engine runs and after it stops. If you touch the muffler, it can cause burns.

• Do not use an engine with a damaged muffler. A damaged muffler increases the noise level and the risk of fire. Keep a fire extinguisher nearby.
• Examine regularly that the muffler is attached to the product.
• Do not touch the engine or the muffler when then engine is on. Do not touch the engine or the muffler for a while after the engine stops. Hot surfaces can cause injuries.
• A hot muffler can cause a fire. Be careful, if you use the product near flammable liquids or fumes.
• Do not touch the parts in the muffler, if the muffler is damaged. The parts can contain some carcinogenic chemicals.
• Some blower models have a spark-arresting screen.Clean and replace the screen at specified intervals. See the Maintenance section (To do maintenance on the spark arrester screen (Fig. 12)

Fuel safety

• Do not start the product if there is fuel or engine oil on the product. Remove the unwanted fuel/oil and let the product dry. Remove unwanted fuel from the product.
• If you spill fuel on your clothing, change clothing immediately.
• Do not get fuel on your body, it can cause injury. If you get fuel on your body, use a soap and water to remove the fuel.
• Do not start the engine if you spill oil or fuel on the product or on your body.
• Do not start the product if the engine has a leak. Examine the engine for leaks regularly.
• Be careful with fuel. Fuel is flammable and the fumes are explosive and can cause injuries or death.
• Do not breathe in the fuel fumes, it can cause injury. Make sure that there is sufficient airflow.
• Do not smoke near the fuel or the engine.
• Do not put warm objects near the fuel or the engine.
• Do not add the fuel when the engine is on.
• Make sure that the engine is cool before you refuel.
• Before you refuel, open the fuel tank cap slowly and release the pressure carefully.
• Do not add fuel to the engine in an indoor area.

Not sufficient airflow can cause injury or death because of asphyxiation or carbon monoxide

• Tighten the fuel tank cap carefully or a fire can occur.
• Move the product at a minimum of 3 m (10 ft) from the position where you filled the tank before a start.
• Do not put too much fuel in the fuel tank.
• Make sure that a leak cannot occur when you move the product or fuel container.
• Do not put the product or a fuel container where there is an open flame, spark or pilot light. Make sure that the storage area does not contain an open flame.
• Only use approved containers when you move the fuel or put the fuel into storage.
• Empty the fuel tank before long-term storage. Obey the local law on where to dispose fuel.
• Clean the product before long-term storage.
• Remove the spark plug cable before you put the product into storage to make sure that the engine does not start accidentally. Safety instructions for maintenance

WARNING: Incorrect maintenance can result in serious engine damage or in serious injury.

The owner is responsible for the performance of all necessary maintenance as specified in the operator’s manual. Disconnect the spark plug before maintenance. Do not disconnect the spark plug before carburetor adjustments

Assembly

WARNING: Read the safety chapter before you assemble the product. To install the blower tube and nozzle on the product
Note: The bolt must be sufficiently loose to put the blower tube into the blower outlet. Turn the bolt counterclockwise with a screwdriver to loosen it.

1. Align the rib on the upper blower tube with the groove in the blower outlet. Move the tube into position.

2. Turn the bolt clockwise with a screwdriver to attach the tube.
   Note: Do not use any tool on the nut.

3. Align the slots on the lower blower tube with the tabs on the upper blower tube. Move the lower blower tube onto the upper blower tube.

4. Turn the lower blower tube clockwise until there is a click.

Operation

WARNING: Read and understand the safety chapter before you operate the product.

Fuel

To use fuel

• CAUTION: This product has a two-cycle engine. Use a mixture of gasoline and two-cycle engine oil. Make sure to use the correct quantity of oil in the mixture. An incorrect ratio of gasoline and oil can cause damage to the engine.

Gasoline

• CAUTION: Do not use gasoline with an octane number less than 90 RON (87 AKI). This can cause damage to the product.
• CAUTION: Do not use gasoline with more than 10% ethanol concentration (E10). This can cause damage to the product.
• CAUTION: Do not use leaded gasoline. This can cause damage to the product.
• Always use new unleaded gasoline with a minimum octane number of 90 RON (87 AKI) and with less than 10% ethanol concentration (E10).
• Use gasoline with a higher octane number if you frequently use the product at continuously high engine speed.
• Always use a good quality unleaded gasoline/oil mixture.

Two-cycle engine oil

• Use only high-quality two-cycle engine oil. Use only an air-cooled engine oil.
• Do not use other types of oil.
• Mixture ratio 50:1 (2%)

To make the fuel mixture

• Note: Always use a clean fuel container when you mix the fuel.
• Note: Do not make more than 30 days quantity of fuel mixture.

1. Add half of the gasoline quantity.
2. Add the full quantity of oil.
3. Shake the fuel mixture to mix the contents.
4. Add the remaining gasoline quantity.
5. Shake the fuel mixture to mix the contents.
6. Fill the fuel tank.

To add fuel

• Always use a fuel container with an antispill valve.
• If there is some fuel on the container, remove the unwanted fuel and let the container dry.
• Make sure that the area near the fuel tank cap is clean.
• Shake the fuel container before you add the fuel mixture to the fuel tank.

To start and stop

Before you start the engine

• Examine the product for missing, damaged, loose or worn parts.
• Examine the nuts, screws and bolts.
• Examine the air filter.
• Examine the throttle trigger for correct operation.
• Examine the stop switch for correct operation.
• Examine the product for fuel leaks.

To start a cold engine

• WARNING: Do not wind the starter rope around your arm.
• CAUTION: Do not hold the product with your foot.
• CAUTION: Do not pull the starter rope to the end position. Do not let go of the starter rope handle when the starter rope is extended. This can damage the product

Note: If the engine stops, move the choke control to the closed position and do the starting steps again.

1. Fill the fuel tank with a clean fuel mixture.
2. Push the primer bulb 10 times. (Fig. 13)
3. Move the engine choke control to the FULL CHOKE (closed) position. (Fig. 14)
4. Push the variable speed control fully counterclockwise. (Fig. 15)
5. Use your left hand to hold the body of the machine on the ground.
6. Pull the starter rope handle until the engine tries to run. Do not pull more than 3 times.
7. Move the choke control to the 1/2 position and pull the starter rope handle until the engine starts and runs. (Fig. 16)
8. Run the engine for approximately 10 seconds.
9. Push and hold the throttle trigger fully through all remaining steps.
10. Move the choke control to the OFF CHOKE (opened) position. (Fig. 17)
11. Warm the engine up for 1 minute.

To start a warm engine

1. Push and hold the throttle trigger.
2. Move the choke control to 1/2 position.
3. Pull the starter rope handle quickly while you pull the throttle trigger until the engine runs.
4. Move the choke control to the OFF CHOKE (opened) position.

To stop the engine

• Push and release the engine STOP switch. The switch automatically returns to the ON position. Wait 7 seconds before you try to restart the product to make sure that the switch resets.

To use a nozzle

• Use the standard nozzle when precision and high air stream concentration is necessary. (Fig. 18)
• Use the high-velocity nozzle when a wider airstream and large air velocity is necessary. (Fig. 19)

To adjust the blower nozzle

1. Twist the nozzle to the left to disengage the bayonet mount.
2. Move the nozzle to the applicable position.
3. Twist the nozzle to the right until you feel a click.

Maintenance

WARNING: Read and understand the safety chapter before you clean, repair or do maintenance on the product.

Maintenance schedule

Make sure that you obey the maintenance schedule. The intervals are calculated from daily use of the product. The intervals are different if you do not use the product each day. Only do the maintenance work that is found in this manual. Speak to an approved service centre about other maintenance work not found in this manual.

Daily maintenance

• Clean the external surfaces.
• Examine the speed control and the throttle trigger function. Replace damaged parts.
• Examine the stop switch. If it is necessary, replace it.
• Examine the idle speed.
• Clean the air filter. If it is necessary, replace it.
• Make sure that the inlet cover can be locked in the closed position. Make sure that the impeller is clean.
• Tighten all nuts and screws.
• Make sure that the housings are free of cracks.

Weekly maintenance

• Examine the condition of the starter device, the starter rope and the tension spring. Replace all damaged parts.
• Examine the condition of the air intake at the starter device. Remove debris if the air intake is clogged.
• Clean the external side of the spark plug. Remove it and examine the electrode gap. Adjust the distance to 0.6 mm (0.024 in) or replace the spark plug.
• Clean the blades on the impeller.
• Clean the spark-arresting screen and replace it if necessary (not on mufflers with a catalytic converter).
• Clean the carburetor area.
• Clean the air filter.

Monthly maintenance

• Examine the starter rope handle and the starter rope.
• Clean the fuel tank.
• Clean the carburettor and the area around it.
• Clean the blades on the impeller.
• Examine the fuel lines for cracks or other damage. Change if necessary
• Change the fuel filter in the fuel ank
• Examine all cables and connections.
• Replace the spark plug.
• Change the air filter.

Yearly maintenance

• Examine the spark plug.
• Clean the external surface of the carburettor and its adjacent areas.
• Clean the cooling system.
• Examine the spark arrester screen.
• Examine the fuel filter.
• Examine the fuel hose for damage.
• Examine all cables and connections.

50 hours maintenance

• Have an approved service center repair or replace the muffler.

To adjust the idle speed

• Make sure that the air filter is clean and the air filter cover is attached before you adjust the idle speed.
• Adjust the idle speed with the idle adjustment screw T which is identified with the “T” mark.
• The idle speed is correct when the engine operates smoothly in all positions. (Fig. 20)

1. Turn the idle adjustment screw clockwise for higher speed.
2. Turn the idle adjustment screw counterclockwise for lower speed. To do maintenance on the spark arrester screen Use a wire brush to clean the spark arrester screen. To clean the cooling system (Fig. 21) Clean the parts of the cooling system with a brush.

To examine the spark plug

CAUTION: Always use the recommended spark plug type. Incorrect spark plug type can cause damage to the product.

1. Examine the spark plug if the engine is low on power, is not easy to start or does not operate correctly at idle speed.

To decrease the risk of unwanted material on the spark plug electrodes, obey these instructions:

• a) Make sure that the idle speed is correctly adjusted.
• b) Make sure that the fuel mixture is correct.
• c) Make sure that the air filter is clean.
• If the spark plug is dirty, clean it and make sure that the electrode gap is correct, refer to the Technical data on page 11. (Fig. 22)
• Replace the spark plug if it is necessary. To do the maintenance to the air filter

To clean the air filter

1. Remove the air filter cover and remove the air filter. (Fig. 23)
2. Clean the air filter with warm soap water. Make sure that the air filter is dry before you install it.
3. Replace the air filter if it is too dirty to fully clean it. Always replace a damaged air filter.
4. If your product has a foam air filter, apply air filter oil. Only apply air filter oil to a foam filter. Do not apply oil to a felt filter.

Technical data

| HB281

(125B28HV)

---|---
Engine Specifications
Cylinder displacement, cu.in / cm3| 1.71 / 28
Idle speed, min-1| 2800 – 3200
Maximum power speed, min-1| 8000
Maximum speed blow mode, min-1| 8600
Power / Max. engine output, kW / HP| 0.8 / 1.1
Ignition system
Spark plug| Champion RCJ-6Y
---|---
Electrode gap, inch/mm| 0.024 / 0.6
Fuel and lubrication system
Fuel tank capacity, US Pint / l| 1.06 / 0.5
Weight
Weight without fuel, lb/kg| 9.4 / 4.26
Fan performance
Max. air velocity, standard nozzle, m/s / mph| 60.3 / 135
Max. air velocity, high velocity nozzle, m/s / mph| 75.8 / 170
Airflow, blow mode, m3/min / cfm| 12.0 / 425
optional accessory for some models

Accessories

HB281

Approved accessories| Model no.| Type
Gutter clean-out kit| GK-280| 952 711 678

• www.redmax.com

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