User Manual - Hyundai Power Equipment

Model HYBC4300
Licensed by Hyundai Corporation Korea
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9 – 10
10 – 12
13 – 16
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1.1. The operator of the machine is;
Responsible for and has a duty of care in making sure that the
machine is operated safely and in accordance with the instructions in
this user manual.
Should never be left it in a condition which would
allow an untrained or unauthorised person/s to operate this
All due care and diligence should be taken by the operator for the
safety of and with regard to those around whilst using the machine, to
include but not limited to;
Elderly, children, pets, livestock and property.
1.2. Some or all of the following PPE, Warning Signs and symbols may appear
throughout this manual and you must adhere to their warning/s. Failure to
do so may result in personal injury.
Personal Protective Equipment (PPE)
Warning Signs and Symbols – FOLLOW safety messages to avoid or reduce risk of injury or death.
DANGER - indicates a
hazard which if not
avoided could result in
serious injury or death.
WARNING - indicates a
hazard which if not
avoided could result in
serious injury or death.
CAUTION - indicates a
hazard which if not
avoided might result
in minor or moderate
NOTE - indicates a
situation that could
easily result in
equipment damage.
1.3. Carbon Monoxide
Carbon monoxide is a colourless and odourless, inhaling this gas
can cause death as well as serious long term health problems such as
brain damage.
1.3.2. The symptoms of carbon monoxide poisoning can include the following;
Page 4 Headaches, dizziness, nausea, breathlessness, collapsing or
loss of consciousness. Carbon monoxide symptoms are similar to flu, food poisoning, viral
infections and simply tiredness. That’s why it’s quite common for people to
mistake this very dangerous poisoning for something else.
1.3.3. To avoid Carbon monoxide poisoning DO NOT Use Petrol/Diesel powered
equipment inside a home or garage even if doors and windows are open.
1.3.4. If you think you or someone around you has been affected by carbon
monoxide poisoning; Get fresh air immediately. Open doors and windows, turn off machine and leave the affected area. See your doctor immediately or go to hospital - let them know
that you suspect carbon monoxide poisoning.
1.3.5. DO NOT use in an enclosed area or a moving vehicle.
1.4. General fuel safety.
1.4.1. Fuel Safety additional information can be obtained from the Health and
Safety Executive (HSE) document SR16.
All fuels are Flammable.
1.4.3. Keep away from all ignition sources i.e. Heaters, Lamps, sparks from
Grinding or welding.
1.4.4. Hot work on tanks that have contained fuel is extremely dangerous and
should not be carried out.
1.4.5. Keep work area clean and tidy.
1.4.6. Clean up all spills promptly using correct methods i.e. absorbent granules
and a lidded bin.
1.4.7. Dispose of waste fuels correctly.
1.4.8. Diesel safety. Always fuel and defuel in well-ventilated area. Always wear correct, suitable and fit for purpose Personal
Protective Equipment (PPE), suggested items are as follows, but
are not limited too.
Hand protection.
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Protective clothing.
Respiratory protective equipment should be used when in
an unventilated area.
When defueling always use a propriety fuel retriever.
Always carry fuel in the correct and clearly marked container.
1.4.9. Petrol safety. Always fuel and defuel in well-ventilated area. Always wear correct, suitable and fit for purpose Personal
Protective Equipment (PPE), suggested items are as follows, but are not
limited too.
Hand protection.
Protective clothing.
Respiratory protective equipment should be used when in an
unventilated area. When defueling always use a propriety fuel retriever. Always carry fuel in the correct and clearly marked container.
Additional safety Never use the product, When the ground is slippery or when you cannot maintain a steady
footing. At night, in foggy conditions or at any other times when your field of
vision is limited and you do not have a clear view of the working area. During lightning storms, rain, snow, icy or any other conditions that
makes it unsafe to use the product safely. Working plan. You should never use the product when under the influence
of alcohol and drugs, when suffering from exhaustion, lack of sleep, when
suffering from drowsiness caused by any medication. Or at any other time
where your judgment has been impaired. When planning your work schedule allow plenty of time for
rest breaks. Limit the amount of time the product is used continuously
approximately 30-40 minutes per session and take breaks between use of
10 to 20 minutes. Try to keep the amount of work performed in a single
day to under 2 hours. To avoid noise complaints only use the machine at times laid
down locally by your local authority.
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1 - Handle
6 - Shaft
11 - Recoil
starter handle
2 - Throttle
7 - Cutting
12 - Fuel tank
3 - Throttle set
8 - Strimmer
13 - Primer
4 - ON/OFF
9 - Gear case
5 - Shoulder strap
hanger point
10 - Spark arrester
14 - Choke
15 - Air filter cover
2.1. Warning labels on machine.
2.1.1. (1) Read owner’s manual before operating this machine.
2.1.2. (2) Wear head, eye and ear protection.
2.1.3. Warning/Attention.
2.1.4. Keep all children, bystanders and helpers at least 15 m away from
working area.
If a warning label comes off or becomes dirty and
impossible to read you should contact your dealer for
Never modify your brush cutter – Any unauthorized
modifications will invalidate your warranty.
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3.1. Handle assembly.
3.1.1. Attach clamp (1) to shaft using the supplied
screws (2).
3.1.2. Place handle bar (3) into clamp (1), then
place top clamp (4) into the cradle part of
clamp (1), then place top clamp (4) over handle
bar. Using the fixing bolt (5) tighten until
almost secured, move handle bar until desired
position is found then tighten fully.
3.2. Installing or replacing the cutting blade.
3.2.1. Make sure the HT lead is removed from the
spark plug.
3.2.2. Make sure the brush cutter is switched
off and the engine is fully stopped.
3.2.3. Insert a screwdriver or equivalent into the
back shield and the adaptor semicircle hole to
prevent the output shaft from turning.
3.2.4. Loosen the nut with the socket wrench (TWrench) by turning clockwise (view from top).
3.2.5. Then remove spring washer, washer, cover cap, spacer and cutter blade from
the output shaft.
3.2.6. Remove the old cutter blade, and install the new blade.
3.2.7. Install spacer B, the cover cap, the washer and spring washer, then tight the nut.
3.2.8. Remove the ‘prevent rotational wrench’ or equivalent from the back shield and
3.2.9. Before use remove the transportation guard.
3.3. Installing the Trimmer Head.
3.3.1. Make sure the HT lead is removed from the
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spark plug.
3.3.2. Ensure the brush cutter is switched off and
be sure the engine is fully stopped.
3.3.3. Insert a screwdriver or equivalent into the back
shield and the adaptor semicircle hole to prevent the
output shaft from turning.
3.3.4. Loosen the nut with ‘T’ wrench by turning
counter-clockwise (view from top), then
remove spring washer, was her, cover cap,
spacer and cutter blade from the output shaft.
3.3.5. Screw the trimmer head onto the shaft in an anticlockwise direction until tight.
Petrol is highly flammable. Avoid smoking or bringing any source of
ignition or naked flame near fuel, this includes tools which can cause
sparks such as grinders and drills. Before re-fueling make sure the engine
has been stopped and allowed to cool down. Choose an outdoor area at
least 10m from fuel storage point.
4.1. DO NOT use straight unleaded fuel.
4.2. DO NOT use 4 stroke engine oil.
4.3. YOU MUST use an unleaded fuel and 2 stroke oil
4.3.1. Recommended mixing ratio is 40:1.
4.4. How to mix the Petrol/Oil mixture.
4.4.1. Measure the required quantities of unleaded petrol and 2 stroke oil.
4.4.2. Put some of the unleaded petrol into an approved clean container. Mark the
container stating that it is an unleaded petrol/2 stroke oil mixture.
4.4.3. Pour in all of the 2 stroke oil. Mix the mixture until well mixed.
4.4.4. Pour in the remaining unleaded petrol and mix well for at least one minute.
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If the mixture has not been fully mixed there is a danger of the piston jamming
due to insufficient oil.
4.5. Fueling the machine.
4.5.1. Untwist and remove the fuel cap, make sure that the fuel tank inlet is kept
free of any debris and DO NOT allow any debris to enter the fuel tank.
4.5.2. DO NOT overfill – fill to approximately 80% of normal full capacity to allow
for expansion.
4.5.3. Replace the fuel cap and make sure it is fully tightened. DO NOT use the
machine without having the fuel cap fitted.
4.5.4. Fuel mixture which has not been used for over a month or more will clog the
carburetor causing the engine to operate incorrectly. DO NOT dispose of used
fuel down a drain or allow it to drain into a water course. YOU MUST dispose of
unused fuel at an authorised recycling point.
5.1. Starting the engine.
The cutting head will start to rotate when the engine starts.
5.2. Rest the unit on a flat firm surface. Keep the cutting head off the ground and clear
of surrounding objects.
5.3. Push the primer bulb (1) until fuel flows out of the clear tube.
5.4. Move the choke lever (1) to the closed position (2). OP2.
5.5. Set the ignition switch (4) to the start position (5). While
pulling the throttle lever (7), push the throttle set button and
release the throttle. The throttle is now in the start positon.
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5.6. Whilst holding the unit firmly, quickly pull out the recoil
starter handle until the engine fires. OP4.
5.6.1. Avoid pulling the recoil starter handle/rope to its full
extent or allow it to return by letting go of the handle.
Such actions can cause starter failure.
5.7. Move the choke lever (1) downward (3) to open the choke,
and restart the engine. OP2.
5.8. Allow the engine to warm up before starting work.
When restarting the engine immediately after stopping it, leave the choke open.
Over-choking can make the engine hard to start due to excess fuel.
When the engine fails to start after several attempts, open the choke and
repeat the starter handle pulling or remove the spark plug and dry the plug of
excess fuel.
5.9. Stopping the engine.
5.9.1. Release the throttle lever (7) and run the engine for at least ½ a minute.
5.9.2. Then move the ignition switch to the stop position (6). OP3
Adjusting the throttle cable.
5.10.1. The normal play is 1 - 2mm when measured at
the carburetor side end. Readjust with the cable
adjuster as required. (OP5).
Adjusting the idle speed.
5.11.1. If the machine tends to stop frequently at idling
mode, turn the adjusting screw clockwise.
5.11.2. When the cutting head keeps rotating after
releasing the throttle trigger, turn the adjusting
screw anti-clockwise.
You must make adjustments after the engine has had time to warm up.
Cutting (trimming) with cord.
Always wear eye protection, such as safety goggles. Never lean over
the rotating cutting head. Stones and other debris can be thrown
from the cutting head, these may be thrown towards the eyes, head
and body causing injury.
Always keep the guard in place whilst the machine is being used.
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5.12.1. Trimming grass and weeds. Remember that it is the tip of the cord
that’s does the cutting. You will achieve best
results by not trying to overcut instead allow
the unit to trim at its own pace. Hold the unit so the head is of the ground
and is tilted about 20° toward the sweep
direction. OP7. You can help avoid debris and stones form
being thrown by cutting form your left to your right. Use a slow and deliberate action to cut heavy growth. The rate of
cutting motion will depend on how much is being cut. Heavy growth will
require slower action than lighter growth. Never swing the unit so hard as you might be in danger of losing your
balance or loss of machine control. Try to control the cutting motion with the hip rather than placing the
full workload on the arms and hands. Always take precautions to avoid wires, grass and dead dry long
stemmed weeds from wrapping around the shaft. If this happens it can
stall the machine and cause clutch slip which if repeated can cause
damage to the clutch.
5.12.2. Adjusting the cord length. Your brush cutter is equipped with a semi-auto type nylon cord head
that allows the operator to advance the cord without stopping the engine.
When line cord becomes too short lightly tap the head on the ground
while running the engine at full throttle. Each time the head is bumped the cord will advance about 25mm. For
better effect tap the head on bare ground or hard soil. Avoid bumping in
thick tall grass as the engine may stall by overloading.
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You must make sure that the engine has stopped, allowed to cool down
and disabled before commencing any maintenance work.
6.1. Refilling trimmer cord.
6.1.1. Use a replacement cord of 2.4 mm, the spool is capable of taking a cord
length of 6m on the standard head. Avoid using larger line as this will cut down
on the performance of the trimmer.
For safety reasons DO NOT use metal reinforced cord.
6.1.2. (1) - Pinch the slotted area on both
sides of the spool housing to unlock the
bottom cap.
6.1.3. (2) – Take the spool out and remove
the old cord. Fold a new piece of cord (3)
so the one half of the line is 120mm
shorter that the other half. Then hook the
bent over end into the slot on the spool.
6.1.4. (4) Wind up the line in the correct
direction as indicated on the spool.
6.1.5. (5) Hook each end of the cored in the
slots on the edge of the spool. Then pass
the cord ends through the eyelets (6) on
the housing.
6.1.6. (7) While holding the spool against the
housing pull the cord ends to release
them from the slots.
6.1.7. (8) Line up the slot on the bottom cap
with the hook on the housing, press the
cap against the housing until it clicks
6.2. Air filter.
6.2.1. If the air filter becomes clogged it will
reduce the engines performance. Check and clean the air filter
element (1). Wash in warm soapy water,
rinse in clean water. Allow
the filter to dry before reinserting into machine. N.B. if
the filter is damage replace it
with a new one.
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6.3. Fuel filter.
6.3.1. If the engine does not run smoothly check
the fuel filter (1), clean and/or replace as
required. To clean filter remove and wash in
clean fuel.
6.4. Spark plug.
6.4.1. Starting failures and mis-fires are
often caused by a fouled or incorrectly
gapped spark plug.
6.4.2. Remove the HT lead and undo the
spark plug in an anti-clockwise
6.4.3. Clean and/or replace spark plug.
To re-insert spark plug tighten up
gently by hand to avoid cross threading, once done tighten it using a box
spanner ¼ turn more. Make sure the spark plug is tightened correctly
otherwise damage can occur.
6.4.4. NOTE The use of any spark plug other than the one designated may result
in the engine failing to run correctly becoming overheated and damaged.
6.5. Exhaust muffler.
Inspect periodically for any loose
fasteners, damage or corrosion. If any
signs of exhaust leakage are found STOP
using the machine and get it properly
repaired or replaced. NOTE failure to get
the exhaust repaired or replaced may
result in the engine catching fire.
6.5.1. The exhaust muffler is fitted with a spark
arrester (1). The spark arrester is fitted to help
prevent red hot carbon from exiting the
exhaust. You must check and clean it with a wire brush. NOTE You must make
sure that the exhaust has been given time to cool down.
6.6. Gear case.
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6.6.1. The reductions gears are internally lubricated
by using a multipurpose lithium based grease .
6.6.2. The grease should be topped up every 25 hours
– more often if required.
6.6.3. To fill with grease remove the side bolt opposite
the grease nipple to allow for excess grease to
come out of the gear case.
6.6.4. DO NOT overfill with grease.
6.7. Intake air cooling vent.
Never touch the cylinder, muffler or spark plugs with your bare hands
immediately after stopping the engine. The engine can become very
HOT when in operation, and in doing so could result in severe burns.
When checking the machine make sure that it is okay before using it,
check the area around the exhaust muffler and remove any flammable
materials which may have attached to the machine. Failure to do so
could cause the exhaust muffler to becomes overheated, and this in turn
could cause the engine to catch on fire.
Always make sure that the exhaust muffler is clean and free of word
chips, leaves and other flammable waste before use.
6.7.1. Check the intake air cooling vent and the area
around the cylinder cooling fins every 25 hours for
signs of blockages. Remove any waste and blockages.
NOTE it may be necessary to remove the engine cover
to view the upper part of the cylinder (1).
6.7.2. IMPORTANT If waste gets stuck and causes a
blockage around the intake air cooling vent or
between cylinder fins, it may cause the engine to
overheat, and in turn may cause mechanical failure.
6.7.3. Procedure to check exhaust muffler must be
carried out after every 100 hours of use. Remove the exhaust muffler, insert a
screwdriver into the vent and wipe away any
carbon build up. At the same time wipe away
any carbon build up on exhaust muffler
exhaust vent and cylinder ports.
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6.8. Maintenance table.
Fuel leaks or spillages
Clean up
See adjust idling speed
Fuel tank, Air filter &
Fuel filter
Replace as
Idle adjusting screw
as required
Clean and readjust spark
Spark plug
plug gap
Cylinder fins, intake
air cooling vent
Muffler, spark
arrester & cylinder
exhaust port
Throttle lever &
Check operation
ignition switch
Replace broken blade or
Cutting parts
strimmer head replace as
Make sure it is fitted at all
Cutting guard
Gear case
Screws, nuts and bolts
Tighten and/or replace as
Not adjust
Engine fails to start
Engine starts but does not
continue to run or hard to
Probable cause
Fuel quality
Incorrect fuel
Fuel filter
Carburetor adjustment
Filter blocked
Corrective action
Drain and fill with correct
Out of normal range
Adjust into normal range
No spark
Fouled or wet spark plug
Plug gap incorrect
Spark plug
Incorrect or stale fuel
Carburetor adjustment
Air filter
Cylinder fin fan cover
Clean and dry
Adjust gap to 0.6mm to
Drain and fill with correct
Out of normal range
Adjust into normal range
Carbon build up
Clogged with dust
Clogged with dust
Wash dry and or replace
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Engine Type
1E40F-5 - Air cooled, two stroke, single
cylinder petrol engine
Engine Size cc
Oil Capacity ml
Fuel tank capacity ml
Noise Level dB
Rated Speed rpm
Rated Power kw
Drive Type
Start Method
Clutch type
Rotation direction
43 (42.7)
2.2 @ 7500rpm
Centrifugal type
Counter-clockwise (viewed from top)
Fuel Ratio/Fuel Type
Cutter head
400mm diameter blade & 450mm bump
feed string trimmer kit
Cutter blade mm/teeth
Cutting Width mm /Length mm /Diameter
255 Brush cutter/400-450 grass trimmer
Gross Weight kg
Dry Weight kg
Fully Assembled Dimensions L x W x H mm
Box Dimensions L x W x H mm
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If you do not follow these steps, deposit may arise in the carburetor.
This will cause starting difficulties and may cause permanent damage
9.1. Perform all the general maintenance that the maintenance section of your ‘User
Manual’ is recommended.
9.2. Clean the outside of the machine, drive axle, shield and nylon cutting head.
9.3. Remove all fuel from the fuel tank.
9.4. After all the fuel is drained, start the engine.
9.5. Allow the engine to run in idle until engine stops alone. This allows the fuel to be
removed from the carburetor.
9.6. Allow engine to cool down (about 5 minutes).
9.7. Use a spark plug wrench, remove the spark plug.
9.8. Pour 1 teaspoon of clean 2-cycle oil into the combustion chamber. Slowly pull the
starter rope several times to coat internal components. Replace the spark plug.
9.9. Store the machine in a cool, dry place away from any source of ignition such as an
oil burner, water heater etc.
9.10. Transporting the machine.
9.10.1. When transporting the machine make sure that no fuel is allowed to leak out.
9.10.2. DO NOT allow the trimmer/brush cutter come into contact with persons,
animals and property.
10.1. Postal address;
Genpower Limited, Isaac Way, Pembroke Dock,
Pembrokeshire, SA72 4RW, UK.
10.2. Telephone contact number; +44 (0) 1646 687880
10.3. Email contacts;
10.4. Web site;
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Genpower Ltd confirms that these Hyundai products conform to the
following CE Directives;
2006/42/EC Machinery Directive
2004/108/EC EMC Directive
2000/14/EC Noise Emissions Directive
97/68/EC NRMM Emissions Directive
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Isaac Way, London Road
Pembroke Dock, UNITED KINGDOM, SA72 4RW
T: +44 (0) 1646 687 880 F: +44 (0) 1646 686 198
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