Hyundai HDBT421T Gasoline Brush Cutter & Grass Trimmer
Original Instructions
Content
1. Safety Warnings
Proper safety precautions must be observed. Like all power equipment, this unit must be handled carefully. DO NOT EXPOSE YOURSELF OR OTHERS TO DANGER.
Follow these general rules. Do not permit others to use this machine unless they are thoroughly responsible and have read and understand the machine manual and are trained in its operation.
- Always wear safety goggles for eye protection. Dress properly; do not wear loose clothing or jewelry that could become caught in moving parts of the unit. Safe, sturdy, nonskid footwear should always be worn. Long hair should be tied back. It is recommended that legs and feet be covered to protect from flying debris during operation.
- Inspect the entire machine for loose parts (nuts, bolts, screws, etc.) and any damage. Repair or replace as necessary before using the machine. DO NOT USE any attachment with this power head other than the ones recommended by Hyundai. Serious injury to the operator or bystanders could result, as well as damage to the machine.
- Keep the handles free from oil and fuel.
- Always use proper handles and shoulder strap when cutting.
- Do not smoke while mixing fuel or filling tank.
- Do not mix fuel in an enclosed room or near open flames. Assure adequate ventilation.
- Always mix and store the fuel in a properly marked container that is approved by local codes and ordinances for such usage.
- Never remove the fuel tank cap while the engine is running.
- Never start or run the engine inside a closed room or building. Fumes from the exhaust contain dangerous carbon monoxide.
- Never attempt to make engine adjustments while the unit is running and strapped to the operator. Always make engine adjustments with the unit resting on a flat, clear surface.
- Do not use the unit if it is damaged or poorly adjusted. Never remove the machine's guard. Serious injury to the operator or bystanders could result, as well as damage to the machine.
- Inspect the area to be cut and remove all debris that could become entangled in the nylon cutting head. Also remove any objects that the unit may throw during cutting.
- Keep children away. Onlookers should be kept at a safe distance from the work area, at least 15 meters (50 FEET).
- Never leave the machine unattended.
- Do not use this unit for any job other than those for which it is intended as described in this manual.
- Do not overreach. Keep proper footing and balance at all times. Do not run the unit while standing on a ladder or on any other unstable footing location.
- Keep hands and feet clear of the nylon cutting head or blade while unit is in use.
- Do not use this type of machine for sweeping away debris.
- Do not use the unit when you are tired, ill or under the influence of medication, drugs or alcohol.
- Use nylon cutting head which is free of damage. If a stone or any other obstacle is hit, stop the engine and check the nylon cutting head. A broken or unbalanced nylon cutting head must never be used.
- Do not store in a closed area where fuel vapors can reach an open flame from hot water heaters, furnaces, etc. Store in a locked, well-ventilated area only.
- Ensure safe and proper performance of your product. These parts are available from your dealer. The use of any other accessories or attachments may cause a potential hazard or injury to the user, damage to the machine and void this warranty.
- Clean the machine completely, especially the fuel tank, its surroundings, and the air cleaner.
- When refueling, be sure to stop the engine and confirm that it is cooled down. Never refuel when the engine is running or hot. When gasoline spills, be sure to wipe it up completely dispose of those materials before starting the engine.
- Stay clear of other workers or bystanders by at least 15 meters/50 feet.
- Whenever approaching an operator of the machine, carefully call his attention and confirm that the operator stops the engine. Be careful not to startle or distract the operator, which can cause an unsafe situation.
- Never touch the nylon cutting head or blade when the engine is running. If it is necessary to replace the protector or cutting attachment, be sure to stop the engine and confirm that the cutting device has stopped running.
- The engine should be turned off when the machine is moved between work areas.
- Be careful not to hit the nylon cutting head against stones, or the ground.
- Unreasonable rough operation will shorten the life of the machine as well as create an unsafe environment for yourself and those around you.
- Pay attention to loosening and overheating of parts. If there is any abnormality of the machine, stop operation immediately and check the machine carefully. If necessary, have the machine serviced by an authorized dealer. Never continue to operate a machine which may be malfunctioning.
- In start-up or during operation of the engine, never touch hot parts such as the muffler, the high voltage wire or the spark plug.
- After the engine has stopped, the muffler is still hot. Never place the machine in any places where there are flammable materials (dry grass, etc.), combustible gasses or combustible liquids.
- Pay special attention to operation in the rain or just after the rain as the ground may be slippery.
- If you slip or fall to the ground or into a hole, release the throttle lever immediately.
- Be careful not to drop the machine or hit it against obstacles.
- Before proceeding to adjust or repair the machine, be sure to stop the engine and detach the spark plug.
- When the machine is placed in storage for a long time, drain fuel from the fuel tank and carburetor, clean the parts, move the machine to a safe place and confirm that the engine is cooled down.
- Make periodic inspections to assure safe and efficient operation. For a thorough inspection of your machine, please contact a dealer.
- Keep the machine away from fire or sparks.
- It is believed that a condition called Raynaud's phenomenon, which affects the fingers of certain individuals, may be brought about by exposure to vibration and cold. Loss of color and numbness in the fingers. The following precautions are strongly recommended because the minimum exposure which might trigger the ailment is unknown.
- Keep your body warm, especially the head, neck, feet, ankles, hands and wrists.
- Maintain good blood circulation by performing vigorous arm exercises during frequent work breaks and also by not smoking.
- Limit the hours of operation. Try to fill each day with jobs where operating the brush cutter or other hand-held power equipment is not required.
- If you experience discomfort, redness and swelling of the fingers followed by whitening and loss of feeling, consult your physician before further exposing yourself to cold and vibration.
- Always wear ear protection, loud noise for long time can make hearing debase even lost hearing.
- Total face and head protection must be wear to prevent damage from plummet or branch.
- Wear no-slip heavy duty work gloves to improve your grip on the brush cutter handle. Gloves also reduce the transmission of machine vibration to your hands.
- WARNING: The cutter area is still dangerous while the machine is coasting to a stop.
- When transport, this unit must be handled carefully. Do not expose yourself or others to danger.
- Envelop the blade before storage. Keep children away from it.
- Never remove the machine's guard.
- Kickback is a sudden reaction to a pinched or snagged rotating wheel, backing pad, brush or any other accessory. Pinching or snagging causes rapid stalling of the rotating accessory which in turn causes the uncontrolled power tool to be forced in the direction opposite of the accessory's rotation at the point of the binding.
- For example, if an abrasive wheel is snagged or pinched by the workpiece, the edge of the wheel that is entering into the pinch point can dig into the surface of the material causing the wheel to climb out or kick out. The wheel may either jump toward or away from the operator, depending on direction of the wheel's movement at the point of pinching. Abrasive wheels may also break under these conditions.
- Kickback is the result of power tool misuse and/or incorrect operating procedures or conditions and can be avoided by taking proper precautions as given below.
- a) Never place your hand near the rotating accessory. Accessory may kickback over your hand.
- b) Do not position your body in the area where power tool will move if kickback occurs. Kickback will propel the tool in direction opposite to the wheel's movement at the point of snagging.
- c) Use special care when working corners, sharp edges etc. Avoid bouncing and snagging the accessory. Corners, sharp edges or bouncing have a tendency to snag the rotating accessory and cause loss of control or kickback.
- OPERATION OF QUICK RELEASE MECHANISM: Pull the strip to release the machine from you in the case of emergency.
Explanation of Symbols
Symbol | Description |
---|---|
⚠️ | This graphic accompanied by the words WARNING and DANGER calls attention to an act of a condition which can lead to SERIOUS INJURY. |
? | READ & UNDERSTAND Operator's Manual and Safety Manual |
⛑️?⛑️ | ALWAYS WEAR EYE PROTECTION, EAR PROTECTION AND HEAD PROTECTION. |
?? | WEAR FOOT PROTECTION, WEAR GLOVES |
⚠️ | BEWARE OF FALLING OBJECTS |
⚠️ | BEWARE OF FOOT INJURY BY CUTTING ATTACHMENT |
⚠️ | PAY ATTENTION THAT BYSTANDERS ARE NOT INJURED THROUGH FOREIGN OBJECTS THROWN FROM THE MACHINE. |
⚠️ | BEWARE OF THROWN OBJECTS HIT BY CUTTING ATTACHMENTS. NEVER USE WITHOUT PROPERLY MOUNTED BLADE GUARD. BEWARE OF BLADE THRUST. |
?15m | KEEP BYSTANDERS AT LEAST 15 M AWAY. |
?? | DO NOT USE SAW BLADE. |
⚠️ | RISK OF HOT SURFACE |
? 120 dB(A) | GUARANTEE SOUND POWER LEVEL |
2. Your Product
a. Description
The Hyundai HDBT421T is a Gasoline Brush Cutter & Grass Trimmer designed for various cutting applications.
Components:
- 1. BLADE 3Z: For grass, weed, or brush cutting applications. Harness and plastic shield are required for blade operation.
- 2. NYLON CUTTER HEAD: Contains replaceable nylon trimming line that advances when the trimmer head is tapped against the ground while the head is turning at normal operating speed.
- 3. CUT-OFF KNIFE: Trims nylon filament to the correct length (7 inches). If the trimmer is operated without a cut-off knife and the line becomes too long, the engine may overheat or be damaged.
- 4. DEBRIS SHIELD: Mounted just above the cutting attachment, it helps protect the operator by deflecting debris. Do not operate the unit without the shield.
- 5. HANDLE: Adjustable for operator comfort.
- 6. DRIVE SHAFT ASSEMBLY: Contains a specially designed liner hard drive shaft.
- 7. IGNITION SWITCH: A slide switch mounted on top of the Throttle Trigger Housing. Move switch FORWARD to STOP, BACK to RUN.
- 8. SAFETY LEVER: Compress before acceleration.
- 9. THROTTLE TRIGGER: Spring-loaded to return to idle when released. Accelerate gradually for best operating technique. Do not hold the trigger while starting.
- 10. PURGE BULB: Push 7 to 10 times before starting to remove air and fuel from the fuel system and introduce fresh fuel to the carburetor.
- 11. FUEL TANK LID.
- 12. FUEL TANK: Contains fuel and fuel filter.
- 13. AIR CLEANER COVER: Contains a replaceable felt element.
- 14. CHOKE: Located on the top of the filter cover.
- 15. STARTER HANDLE: Pull handle until the engine starts, then return handle slowly. Do not let the handle snap back or damage the starter.
b. Technical Data
Specification | Model: HDBT421T |
---|---|
Remote type | Centrifugal Clutch; Hard transmission |
Maximum speed of cutter head (r/min) | 8,000 |
Idle speed of engine (r/min) | 3,000 ±300 |
Centrifugal speed (r/min) | 3,800 |
Measured vibration emission value (m/s²) (According to ISO 22867) | Brush cutter: Left handle: 7.126, Right handle: 7.867 Grass trimmer: Left handle: 8.918, Right handle: 10.17 K=1.5 |
Measured sound pressure level LpA dB(A) (According to ISO 22868) | Brush cutter: 97 dB (A), Grass trimmer: 98 dB (A) K=3 dB (A) |
Measured sound power level LwA dB(A) (According to ISO 22868) | Brush cutter: 107 dB (A), Grass trimmer: 108 dB (A) K=3 dB (A) |
Guaranteed sound power level | 120 dB (A) |
Line Max. Cutting Path /Diameter of line | 44 cm (2.5mm, 7,500 min⁻¹) |
Metal blade (Type/Diameter) | 3-tooth, Ø230xØ25.4x1.4mm, 8,000 min⁻¹ |
Rotation direction of cutting device | Counter-Clockwise (seen from the top) |
Type of aluminum pole | 1 piece |
Weight when dry (kg) | 7.3 |
Engine Name | SPK1E40F(1) |
Engine Type | Air-cooled; 2 cycle; vertical Piston valve; gasoline engine |
Displacement (cm³) | 43 |
Maximum output (kW) (in accordance with ISO 8893) | 1.23 |
Maximum speed of engine (/min) | 10,000 |
Specific fuel consumption at max. engine performance (g/kWh) | ≤620 |
Carburetor | Diaphragm-type |
Ignition | Non-contact electronic ignition |
Method of starting | Recoil type |
Fuel used | Gasoline mixed with lubricating oil (ratio of 40:1) |
Fuel tank capacity (cm³) | 1200 |
3. Assembly
Installing Handle
Install the handle in the bracket. Position the handle in a comfortable operating position and tighten the four bolts.
Diagram showing handle installation with screws and bracket.
Installing the Guard of Protection
Install the guard of protection on the housing. Screw it with the two provided screws.
Installing Nylon Line Cutter Head (for Grass Trimming)
Align the hole of the upper plate with the hole in the shaft and insert a locking tool (such as a wrench). Remove the locking nut and the lower plate. Install the line cutter head by turning it counter-clockwise until it is tight. Remove the locking tool.
To remove the cutting head, insert a locking tool into the hole of the shaft, then unscrew the cutting head. This must be done when the tool is off and cooled.
Images showing the process of installing the nylon line cutter head.
Installing the Metal Blade (for Brushcutting)
When installing and removing the blade, pay attention to its sharp edges. Wear protective gloves.
Align the hole of the upper plate with the hole in the shaft and insert a locking tool (such as a wrench). Remove the locking nut and the lower plate. Install the blade on the upper plate. Install the lower plate. Then, screw the locking nut to secure the installation.
Images showing the process of installing the metal blade, with a note about maximum RPM.
Do the inverse steps to remove the blade.
Installing the Shoulder Strap
Hang the harness in its dedicated location on the tube. Adjust the size of the harness properly to have a correct working position.
Image showing the shoulder strap attachment.
Please do not use both functions at the same time. Before using the tool, check that the tubes, cutting accessories, and the harness are properly installed.
4. Operation
Rules for Safe Operation
WARNING! DANGER
All models of trimmers and brush cutters can throw small stones, metal, or small objects, as well as the material being cut. Read these “Rules for Safe Operation” with care.
Follow the instructions in your operator's manual. Read the operator's manual carefully. Be thoroughly familiar with the controls and proper use of the unit. Know how to stop the unit and shut off the engine. Know how to unhook a harnessed unit quickly.
Never allow anyone to use the unit without proper instruction. Be sure the operator wears the foot, leg, eye, face, and hearing protection from thrown objects. Keep the area clear of bystanders, children, and pets. Never allow children to operate or play with the unit.
Do not allow anyone to enter the operating DANGER ZONE with you. The danger zone is an area 15 meters in radius (about 50 feet).
Insist that persons in the RISK ZONE beyond the danger zone wear eye protection from thrown objects. If the unit must be used where there are unprotected people, operate at a low throttle speed to reduce the risk of thrown objects.
Move the stop switch to the "o" position when the engine idles; ensure it is reliable before cutting. Only continue to operate the unit when the stop switch is in good condition. Routinely check that the cutting attachment stops turning when the engine idles.
WARNING! DANGER
In addition to head, eye, face, and ear protectors, shoes to protect your feet improve your footing on slippery surfaces. Do not wear ties, jewelry, or loose, dangling clothing which could be caught in the unit.
Do not wear open-toed footwear, or go bare-foot or bare-legged. In certain situations, you must wear total face and head protection.
Diagram illustrating the 15-meter danger zone around the operator.
DANGER ZONE
NO PERSON EXCEPT OPERATOR ALLOWED WITHIN 15 METERS RADIUS DANGER ZONE. EYE, EAR, FACE, FOOT, LEG AND BODY PROTECTION MUST BE WORN BY OPERATOR. PERSONS IN ZONE OR RISK BEYOND DANGER ZONE SHOULD WEAR EYE PROTECTION AGAINST THROWN OBJECTS. RISK DIMINISHES WITH DISTANCE FROM DANGER ZONE.
Cutting with a Nylon Head
WARNING! DANGER
The proper debris shield must be in place on the unit when nylon cutting line is used. The cutting line can flap around if too much line is exposed. Always use the plastic debris shield with the cut-off knife when using nylon cutting heads.
For nearly all cutting, it is good to tilt the line head so that contact is made on the part of the line circle where the line is moving AWAY from you and the debris shield. This results in the debris being thrown AWAY from you.
WARNING! DANGER
Tilting the head to the wrong side will shoot the debris TOWARDS you. If the line head is held flat to the ground so that cutting occurs on the whole line circle, debris will be THROWN at you, drag will slow the engine down, and you will use up a lot of line.
WARNING! DANGER
Use only quality nylon monofilament line of the diameter 2.5mm. Never use wire or wire-reinforced line in place of nylon trimmer line. Load your nylon line cutting head only with nylon trimmer line of the proper diameter.
WARNING! DANGER
Use extreme caution when operating over bare spots and gravel, because the line can throw small rock particles at high speeds. Debris shields on the unit cannot stop objects which bounce or ricochet off hard surfaces.
Trimming
This is feeding the trimmer carefully into the material you wish to cut. Tilt the head slowly to direct debris away from you. If cutting up to a barrier such as a fence, wall, or tree, approach from an angle where any debris ricocheting off the barrier will fly away from you. Move the line head slowly until the grass is cut right up to the barrier, but do not jam (overfeed) the line into the barrier. If trimming up to a wire mesh or chain-linked fence, be careful to feed only up to the wire. If you go too far, the line will snap off around the wire. Trimming can be done to cut through weed stems one at a time. Place the trimmer line head near the bottom of the weed—never high up, which could cause the weed to chatter and catch the line. Rather than cut the weed right through, just use the very end of the line to wear through the stem slowly.
WARNING! DANGER
Do not use a steel blade for edging or scalping.
Scalping and Edging
Both of these are done with the line head tilted at a steep angle. Scalping is removing top growth, leaving the earth bare. Edging is trimming the grass back where it has spread over a sidewalk or driveway. During both edging and scalping, hold the unit at a steep angle and in a position where the debris, and any dislodging dirt and stones, will not come back towards you even if they ricochet off the hard surface. Although the picture shows how to edge and scalp, every operator must find for himself the angles which suit his body size and cutting situation.
WARNING! DANGER
Do not trim in any area where there are strands of fencing wire. Wear protective safety gear. Do not cut where you cannot see what the cutting device is cutting.
Cutting with a Blade
The machine is provided with a 3-tooth metal blade for cutting brush and weeds up to 3/4" in diameter.
Use of a saw blade with this machine is prohibited.
WARNING! DANGER
DO NOT USE A BRUSH CUTTER FOR CUTTING TREES.
WARNING! DANGER
Do not cut with a dull, cracked, or damaged metal blade. Before cutting growth, inspect for obstructions such as boulders, metal stakes, or strands of wire from broken fences. If an obstruction cannot be removed, mark its location so that you can avoid it with the blade. Rocks and metal will dull or damage a blade. Wire can catch on the blade head and flap around or be thrown into the air.
WARNING! DANGER
Use the shoulder harness at all times. Adjust both harness and harness clamp on the unit so that the unit hangs a few inches above ground level. The cutting head and the debris shield should be level in all directions. Harness the unit on the right side of your body.
Sc ything Weeds
This is cutting by swinging the blade in a level arc. It can quickly clear areas of field grass and weeds. Scything should not be used to cut large, tough weeds or woody growths.
NOTE: Do not use a brush blade to cut trees which exceed a diameter of 1/2 to 3/4 inches.
Scything can be done in both directions, or just in one way which results in the debris being thrown away from you. That is using the side of the blade that is rotating away from you. Tilt down the blade slightly on this same side. You will be hit by some debris if you scythe in both directions.
Cut only with the side of the blade that the debris is moving away from you.
If kickback occurs, the blade may be dull, or the material so thick and hard that you should use other tool instead of this machine.
Do not force the blade to cut. Do not change the angle of cut after into the wood. Avoid using any pressure or leverage which could cause the blade to bind or crack.
Fuel & Oil Mixture
Never fill the fuel tank to the very top. Never add fuel to the tank in a closed, non-ventilated area. Do not add fuel to this unit close to an open fire or sparks. Be sure to wipe off spilled fuel before attempting to start the engine. Do not attempt to refuel a hot engine.
Fuel used for this model is a mixture of unleaded gasoline and approved engine lubricant. When mixing gasoline with two-cycle engine oil, use only gasoline which contains NO ETHANOL or METHANOL (Types of Alcohol). Use Branded 89 octane or higher Unleaded gasoline known to be of good quality. This will help to avoid possible damage to engine fuel lines and other engine parts.
MIXTURE RATIO IS 40:1
GASOLINE-40PART, OIL-1 PART
The engine uses two-stroke fuel, a mixture of gasoline and 2-stroke lubricant 40:1.
Fuel mixture at the rate other than 40:1 may cause damage to the engine. Ensure mixture ratio is correct.
IMPORTANT: Two-stroke fuel may separate. Shake fuel container thoroughly before each use. Stored fuel ages. Do not mix more fuel than you expect to use within a month.
GASOLINE: Use branded 89 octane or higher unleaded gasoline known to be of good quality.
STORING FUEL: Store fuel only in a clean, safe, approved container. Check and follow local ordinances on type and location of storage container.
FUEL AND OIL MIXTURE: Inspect fuel tank, making sure that it is clean and fill with fresh fuel. Use a mixture of 40:1.
Preparing for Operations
WHEN MIXING GASOLINE WITH TWO CYCLE ENGINE OIL, USE ONLY GASOLINE WHICH CONTAINS NO ETHANOL OR METHANOL (TYPES OF ALCOHOL). THIS WILL HELP TO AVOID POSSIBLE DAMAGE TO ENGINE FUEL LINES AND OTHER ENGINE PARTS. DO NOT MIX GASOLINE AND OIL DIRECTLY IN THE ENGINE FUEL TANK.
IMPORTANT: Failure to follow proper fuel mix instructions may cause damage to the engine.
- When preparing fuel mixture, mix only the amount needed for the job you are to do. Do not use fuel that has been stored longer than two months. Fuel mixture stored longer than this will cause hard starting and poor performance. If fuel mix has been stored longer than this time, it should be removed and filled with fresh mixture.
WARNING! DANGER
- Never fill the fuel tank to the very top.
- Never add fuel to the tank in a closed non-ventilated area.
- Do not add fuel to this unit close to an open fire or sparks.
- Be sure to wipe off spilled fuel before attempting to start engine.
- Do not attempt to refuel a hot engine.
Check Points Before Operation
- Check for loose bolts, nuts, and fittings.
- Check the air cleaner for dirt. Clean the air filter of all dirt, etc., before operation.
- Check to be sure that the protector is securely in place.
- Check to be sure that it is not leaking.
- Check to be sure the blade is not running in idling speed.
WARNING! DANGER
The engine exhaust from this product contains chemicals known to cause cancer, birth defects, or other reproductive harm.
Operations
Engine Starting and Stopping Procedures
1. First Use and Cold Engine Start
- Set the On / Off switch to the On position (I). (See Pic. A)
- Put the choke in the OFF position. (See Pic. B)
- Press the priming pump, located under the air filter cover, about 7 to 10 times until the fuel enters the carburetor. (See Pic. C)
- Pull the starter gently until you feel a resistance, then pull with a sharp blow. Be careful to accompany the handle to avoid a sudden return of it on the engine of the machine. (See Pic. D)
- After the machine has started, return the choke to the ON position. (See Pic. E)
- Allow the machine to warm up for 2-3 minutes.
2. Warm Engine Start
- To restart the machine when the engine is warm, put the choke in the ON position.
- Pull the starter gently until you feel a resistance, then pull with a sharp jerk.
- Let the engine run until it reaches a steady state.
3. Stopping
WARNING! The cutting device may continue to run for a few seconds after stopping the machine.
- Release the throttle trigger and let the engine idle.
- Turn the ON/OFF switch to the off position (O).
If you experience unusual and excessive vibrations, stop the machine immediately. Perform the checks to determine the cause.
5. Maintenance & Care
Air Filter
- Accumulated dust in the air filter will reduce engine efficiency, increase fuel consumption, and allow abrasive particles to pass into the engine. Remove the air filter as often as necessary to maintain it in a clean condition.
- Light surface dust can readily be removed by tapping the filter. Heavy deposits should be washed out in suitable solvent.
- Remove filter cover by loosening air filter cover knob.
Adjusting Carburetor
NOTE: Do not adjust carburetor unless necessary. If you have trouble with the carburetor, see your dealer. Improper adjustment may cause engine damage and void warranty.
Fuel Filter
- The fuel tank is fitted with a filter. The filter is situated at the free end of the fuel pipe and can be picked out through the fuel port with a piece of hooked wire or the like.
- Check the fuel filter periodically. Do not allow dust to enter into the fuel tank. A clogged filter will cause difficulty in starting the engine or abnormalities in engine performance.
- When the filter is dirty, replace the filter. When the inside of the fuel tank is dirty, it can be cleaned by rinsing the tank out with gasoline.
Check Spark Plug
- Do not attempt to remove the plug from a hot engine in order to avoid possible damage to the threads.
- Spark gap: 0.6-0.7 mm (0.023″-0.028″)
- Fastening torque = 145-155 kg.cm (125-135 in.lb)
6. Troubleshooting
Clean or replace the plug if fouled with heavy oily deposits. Replace the plug if the center electrode is worn rounded at the end.
WARNING: Always cover the metal blade with the transportation guard while transportation and storage.
Transport, Handling
- The engine should be turned off when the unit is moved between work areas.
- After the engine has stopped, the muffler is still hot. Never touch hot parts such as the muffler.
- Confirm that the fuel is not leaked from the tank.
Extended Storage
- Inspect, clean, and repair the unit if necessary.
- Remove all fuel from the tank.
- Start engine: This will consume all fuel in the fuel line and carburetor.
- Remove spark plug and pour one teaspoon of clean motor oil into the spark plug hole of the cylinder; replace spark plug.
- Store in a clean, dry, dust-free area.
Failures such as difficulty in starting the engine, irregularity in functions, and abnormality in performance can normally be prevented if careful attention is paid to all operating instructions and maintenance procedures.
Should the engine not function properly, check the following:
- That the fuel system is in good condition and fuel is flowing to the engine.
- The ignition system is in good condition and the spark plug sparks correctly.
- Compression of the engine is adequate.
Failure to Start
- Dispose of fuel in the tank.
- Ensure that fuel is fresh and clean.
- Check fuel filter to make sure it is clean. (Replace filter if necessary).
- Make sure air filter elements are clean.
- Install new, properly gapped spark plug.
When there is serious trouble with the unit, do not try to repair it yourself but have your distributor or dealer do it for you.
Troubleshooting Guide: Failure to Start
Symptom | Probable Cause | Remedy | |
---|---|---|---|
Cylinder normal |
Fuel system abnormality Fuel filter obstruct |
Add fuel in tank Clean fuel filter |
|
Fuel is too dirty There is water in fuel There is too much mixture ratio is improper |
Replace fuel Replace fuel Tear down spark plug and dry it Mixture peroration |
||
Spark plug fouled with oily deposits Spark plug insulation damage Spark gap is too large or small |
Clean the oil deposits Replace spark plug Adjust spark gap 0.6-0.7mm |
||
Compress normal |
High voltage wire breach or break off Coil looseness |
Replace or tighten Tighten |
|
Piston ring attrition Piston ring is broken Piston ring cementation Spark plug looseness Conjoint surface of the cylinder and crank cast leak |
Replace a new Replace Eliminate Tighten Eliminate |
||
Fuel system normal |
Ignition shortage |
High voltage wire and spark plug contact badness Stop switch failure or short circuit |
Tighten the spark plug cap Repair or replace |
Troubleshooting Guide: Low Output
Muffler fouled with oily deposits Piston, piston ring, cylinder attrition,Conjoint surface of the cylinder and crank cast leak
The seal is bad
Symptom | Probable Cause | Remedy |
---|---|---|
Flameout when speedup | Fuel filter obstruct, fall short of fuel | Clean fuel filter, clean fuel road, adjust carburetor |
The smoke is thin, carburetor spout backward | Clean the oily deposits | |
Compress press is shortage | Replace piston, piston ring Repair Replace seal |
|
Engine leak | Engine overheats | Avoid use it for long time, high speed and heavy load |
The end of two crank shaft leak | Burning room fouled with oily deposits | Clean the oily deposits |
Troubleshooting Guide: Engine Running Unstable
Piston, piston ring, cylinder attrition,Piston pin, piston attrition
Bearing of crank shaft attrition
Symptom | Probable Cause | Remedy |
---|---|---|
There are metal knock sound | Replace piston, piston ring Replace piston pin, piston Replace bearing |
|
There are metal knock sound | Engine overheats Burning room fouled with oily deposits |
Avoid use it for long time, high speed and heavy load clean the oily deposits |
Engine ignition break off | Gasoline branded is unfit There is water in fuel Spark gap is wrong Coil gap is wrong |
Replace required branded octane Instead fuel Adjust spark gap 0.6-0.7mm Adjust coil gap 0.3-0.4mm |
Troubleshooting Guide: The Engine Suddenly Stopped
Probable Cause | Remedy |
---|---|
Fuel is use up | Add fuel |
Spark plug fouled with oily deposits and short circuit | Clean the oily deposits |
High voltage wire fall off | Connect |
7. Declaration of Conformity
HYUNDAI POWER PRODUCTS
CE
Genpower Ltd
Isaac Way London Road Pembroke Dock Pembrokeshire SA72 4RW United Kingdom
Declares that the machines:
Gasoline Brush Cutter & Grass Trimmer
Model: HDBT421T
Serial No.: 20250801551-20250801800
Have been designed in compliance with the following standards:
- EN ISO 11806-1:2022
- EN ISO 14982:2009
- EN ISO 3744:1995 & ISO 10884:1995
And in accordance with the following directives:
- Directive Machine 2006/42/EC
- Directive EMC 2014/30/EU
- Noise Directive 2000/14/EC Annex V & Directive 2005/88/EC
- Emission directive 2016/1628/EU & 2018/989/EU
Measured sound power level LwA dB(A) (According to ISO 22868): Brush cutter: 107 dB (A), Grass trimmer: 108 dB (A), K=3 dB (A)
Guaranteed sound power level (According to ISO 2000/14/EC): 120 dB (A)
Responsible of the Technical file: Mr. Mark Z
Done at Pembrokeshire: 01/07/2025
Signature of Mr. Mark Z
Name of QC manager: Roland Llewellin
8. Warranty
The manufacturer guarantees the product against defects in material and workmanship for a period of 2 years from the date of the original purchase. The warranty only applies if the product is for household use. The warranty does not cover breakdowns due to normal wear and tear.
The manufacturer agrees to replace parts identified as defective by the designated distributor. The manufacturer does not accept responsibility for the replacement of the machine, in whole or in part, and/or ensuing damage.
The warranty does not cover breakdowns due to:
- Insufficient maintenance.
- Abnormal assembly, adjustment, or operations of the product.
- Parts subject to normal wear and tear.
The warranty does not extend to:
- Shipping and packaging costs.
- Using the tool for a purpose other than that for which it was designed.
- The use and maintenance of the machine done in a manner not described in the user manual.
Due to Hyundai's policy of continuous product improvement, specifications may be altered or changed without notice. Consequently, the product may differ from the information contained herein, but a modification will be undertaken without notice if it is recognized as an improvement of the preceding characteristic.
READ THE MANUAL CAREFULLY BEFORE USING THE MACHINE.
When ordering spare parts, please indicate the part number or code, which can be found in the spare parts list in this manual. Keep the purchase receipt; without it, the warranty is invalid. To help you with your product, contact Hyundai by phone or via their website:
+33 (0)9.70.75.30.30
https://services.swap-europe.com/contact
To create a "ticket" via the web platform:
- Register or create your account.
- Indicate the reference of the tool.
- Choose the subject of your request.
- Describe your problem.
- Attach these files: invoice or sales receipt, photo of the identification plate (serial number), photo of the part you need (for example: pins on the transformer plug which are broken).
Logo of SWAP-Europe.
9. Product Failure
What to do if my machine breaks down?
If you bought your product in a store:
- Empty the fuel tank.
- Make sure that your machine is complete with all accessories supplied, and clean! If this is not the case, the repairer will refuse the machine.
- Go to the store with the complete machine and with the receipt or invoice.
If you bought your product on a website:
- Empty the fuel tank.
- Make sure that your machine is complete with all accessories supplied, and clean! If this is not the case, the repairer will refuse the machine.
- Create a SWAP-Europe service ticket on the site: https://services.swap-europe.com
- When making the request on SWAP-Europe, you must attach the invoice and the photo of the nameplate (serial number).
- Contact the repair station to make sure it is available before dropping off the machine.
- Go to the repair station with the complete machine packed, accompanied by the purchase invoice and the station support sheet downloadable after the service request is completed on the SWAP-Europe site.
For machines with engine failure from manufacturers BRIGGS & STRATTON, HONDA, and RATO, please refer to the following instructions.
Repairs will be done by approved engine manufacturers of these manufacturers; see their sites:
- http://www.briggsandstratton.com/eu/fr
- http://www.honda-engines-eu.com/fr/service-network-page;jsessionid=5EE8456CF39CD572AA2AEEDFD290CDAE
- https://www.rato-europe.com/it/service-network
Please keep your original packaging to allow for after-sales service returns or pack your machine with a similar cardboard box of the same dimensions.
For any question concerning after-sales service, you can make a request on our website https://services.swap-europe.com.
Our hotline remains available at +33 (9) 70 75 30 30.
SWAP logo.
10. Warranty Exclusions
THE WARRANTY DOES NOT COVER:
- Start-up and setting up of the product.
- Damage resulting from normal wear and tear of the product.
- Damage resulting from improper use of the product.
- Damage resulting from assembly or start-up not in accordance with the user manual.
- Breakdowns related to carburetion beyond 90 days and fouling of carburettors.
- Periodic and standard maintenance events.
- Actions of modification and dismantling that directly void the warranty.
- Products whose original authentication marking (brand, serial number) has been degraded, altered, or withdrawn.
- Replacement of consumables.
- The use of non-original parts.
- Breakage of parts following impacts or projections.
- Accessories breakdowns.
- Defects and their consequences linked to any external cause.
- Loss of components and loss due to insufficient screwing.
- Cutting components and any damage related to the loosening of parts.
- Overload or overheating.
- Poor power supply quality: faulty voltage, voltage error, etc.
- Damages resulting from the deprivation of enjoyment of the product during the time necessary for repairs and more generally the costs related to the immobilization of the product.
- The costs of a second opinion established by a third party following an estimate by a SWAP-Europe repair station.
- The use of a product which would show a defect or a breakage which was not the subject of an immediate report and/or repair with the services of SWAP-Europe.
- Deterioration linked to transport and storage*.
- Launchers beyond 90 days.
- Oil, petrol, grease.
- Damages related to the use of non-compliant fuels or lubricants.
* In accordance with transport legislation, damage related to transport must be declared to carriers within 48 hours maximum after observation by registered letter with acknowledgement of receipt.
This document is a supplement to your notice, a non-exhaustive list.
Attention: All orders must be checked in the presence of the delivery person. In case of refusal by the delivery person, you must simply refuse the delivery and notify your refusal.
Reminder: The reserves do not exclude the notification by registered letter with acknowledgement within 72 hours.
Information:
Thermal devices must be wintered each season (service available on the SWAP-Europe site). Batteries must be charged before being stored.
Contact Information
For inquiries, please contact:
Genpower Ltd
Isaac Way London Road Pembroke Dock Pembrokeshire SA72 4RW United Kingdom
T: +44 (0)1646 687880 | F: +44 (0)1646 686198
www.hyundaipowerequipment.co.uk
Fabriqué en République Populaire de Chine(PRC)
Importer by Genpower Ltd
Licensed by Hyundai Corporation Holdings, Korea
File Info : application/pdf, 28 Pages, 1.45MB
DocumentDocumentReferences
125-135in.lb
Petits moteurs, générateurs, et nettoyeurs haute pression | Briggs & Stratton
Services SAV & Réparation Outils – SWAP Europe
Services SAV & Réparation Outils – SWAP Europe
Service Europa – Rato-Europe
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