
Instruction Manual
INVERTER GENERATOR
HY6250SEi
WARNING: Read the instructions carefully before use. Iss:Mar/26
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2
Contents
Introduction……..……………………………3
Safety Information…..…………………..4-14
Understand Your Machine.…..…………...4
Personal Safety...…….……………………4-5
Inspect Your Machine………………….......5
Fuel Safety………………………………….6-7
Work Area…………….………………………8
During Use…………….………………………9
Battery Safety…..……………....................10
Electrical Safety...………………….......10-11
Vibration, Noise & Residual Risks…..........12
Intended Use………………….……………13
Personal Protective Equipment…………14
Symbols on the Machine………...15-16
Carbon Monoxide Warning…………16
Unboxing…………………………...............17
Features………………………............18-19
Pre-Operation Checks………............20-23
Oil Level……..………………………………20
Fuel Level…..……………………………….21
Air Filter Checks………..…………………..22
Battery Connection……………………….22
Electrical Unloading…..…………………..23
Machine Grounding….…………………..23
Operation……...………………………..24-27
Starting……………………………………….24
Stopping……………………………………..25
Connecting Appliances…………………..26
Generator Status Indicators………………27
Maintenance & Care…..……………..28-36
General Maintenance………………….28
Service Schedule………………………...29
Oil Maintenance…………………………30
Air Filter Maintenance……………….….31
Spark Plug Maintenance……………….32
Spark Arrestor Maintenance…………...33
Transportation and Storage……………34
Machine Troubleshooting……...........35-36
Troubleshooting………………………….35
HY6250SEi Wiring Diagram…………….36
Specifications………….....………………...37
Recycling And Disposal..………………...38
Declaration Of Conformity…..…………..39
Useful Information…..……………………..40
Our YouTube Channel…..………………..40
Warranty…………………………………….40
Manual Updates….……………………….40
Returning Your Product….……………….40
Leaving A Review….……………………...40
Ordering Spare Parts.……………………..40
Product Record…..………………………...41
Contact Us…..……………………………....42

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3
Introduction
Thank You For Purchasing Your HYUNDAI Product
We work very hard to give all of our customers the best possible service. If you
have any problems, before leaving negative feedback, please contact us to give
us a chance to resolve the issue. We would be delighted if you left us positive
feedback! Thank you for purchasing this product.
Important!
This manual has been produced by Hyundai Power Products and should be kept
with the product. Please read and understand these instructions before you use
your product. Failure to do this may result in personal injury or damage to the
product.
The safety precautions and warnings are to ensure your safety and protect you
from harm or damage to the product.
The information contained in this manual was accurate at the time of production,
however HYUNDAI Power Products may make modifications to the product
without notification.
These are the original product instructions. This document is part of the product;
retain it for the life of the product, passing it on to subsequent holders. Read this
manual in full before attempting to assemble, operate or maintain this product.
This manual describes the purpose of the product and contains all the necessary
information to ensure its correct and safe use. Following all the instructions and
guidance in this manual will ensure the safety of both the product and the
operator and increase the lifespan of the product.
All photographs and drawings within this manual are to help illustrate correct
operation of the product. Every effort has been made to ensure the information
contained in this manual is accurate. However, we reserve the right to amend this
document without prior warning. Always use the latest version of the product
manual.
WARNING: READ THE INSTRUCTION BOOKLET THOROUGHLY BEFORE USING
THE MACHINE. Keep for future reference and pass it on if the machine is
loaned or sold to another user.
!

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Safety Information
Understand Your Machine
• WARNING! You must read these instructions carefully before operating the
machine. Make sure that you are familiar with the controls and properly operate
the machine. You must learn how to stop the machine quickly. If you do not follow
the warnings and instructions, it may result in fire and/or serious injury. Make sure to
save all warnings and instructions for future reference.
• Read this manual and labels affixed to the machine to understand its limitations
and potential hazards.
• Be thoroughly familiar with the controls and their proper operation. Know how to
stop the machine and disengage the controls quickly.
• If the unit is to be used by someone other than original purchaser, or is to be
loaned, rented, or sold, always provide this manual and any needed safety
training before operation. The user can prevent and is responsible for accidents or
injuries that may occur to themselves, to other people, or to property.
• Do not force the machine beyond its limits. Use the correct machine for your
application.
• Know how to stop the machine quickly in case of emergency. Understand the
use of all controls.
• ALL MAINTENANCE other than that listed in this manual, should be carried out by
professionally trained and certified personnel.
• When using this machine for the first time and before actual work, you MUST
learn how to handle the machine from an experienced or skilled person.
Personal Safety
• WARNING! Never allow children or people unfamiliar with these instructions to
use the product. Local regulations can restrict the minimum age of the operator.
• Keep children, pets, and other people not using the unit away from the work
area (at least 15m). Be alert and shut off the unit if anyone enters work area. Keep
children under the watchful care of a responsible adult.
• Stay alert, watch what you are doing and use common sense when operating
the machine. Never operate the machine when unwell or tired, or if you have
taken alcohol, medicine, drugs or any substances which may slow your reflexes
and compromise judgment. A moment of inattention while operating the machine
may result in serious personal injury.
• Appropriate Personal Protective Equipment (PPE), MUST be worn at all times
when operating or repairing the machine. Always wear anti-slip and resistant work
footwear and long trousers while using the machine. Do not use the machine
when barefoot, wearing sandals or similar lightweight footwear. Do not wear
chains, bracelets or clothing that is loose fitting or hanging ties or cords. Tie long
hair back. Always wear protective earplugs. Loose clothes, jewellery, or long hair
can be caught in moving parts. Protect eyes, face, and head from objects that
may be thrown from the unit. Always wear safety goggles or safety glasses with
side shields when operating.
•Always keep hands and feet away from all moving parts during operation.
Moving parts can cut or crush body parts. Always keep hands and feet away from
all pinch points.
!
!

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Safety Information
Personal Safety (Continued)
• Do not touch parts that might be hot from operation. Allow parts to cool before
attempting to maintain, adjust, or service.
• Do not overreach. Keep proper footing and balance at all times. This enables
better control of the machine in unexpected situations. Extending your body too
far can result in a loss of balance and you may fall which will result in injury.
• Never place any part of your body where it would be in danger if movement
should occur during assembly, installation, and operation, maintenance, repairing
or moving.
• Keep in mind that the operator or user is responsible for accidents, hazards or
unexpected events involving the machine that occur to other people or their
property. It is the responsibility of the user to assess the potential risk of the area
where work is being carried out. The operator or user must take all necessary
precautions to ensure their own safety and that of others, especially on slopes or
rough, slippery and unstable ground.
Inspect Your Machine
• Check your machine before starting it. Keep guards in place and in working
order. Make sure all nuts, bolts, etc., are securely tightened.
• You must check the general condition of the machine before use.
• Never operate the machine when it is in need of repair or is in poor mechanical
condition. Replace damaged, missing, or failed parts before using it. Check for fuel
leaks. Keep the machine in safe working condition.
• Do not use the machine if the machine’s switch does not turn off the machine
when running. Any machine that can’t be controlled with the switch is dangerous
and must be replaced.
• Regularly check to see that keys and adjusting wrenches are removed from the
machine area before starting it. A wrench or a key that is left attached to a
rotating part of the machine may result in personal injury.
• If the machine should start to vibrate abnormally, stop the machine and check
immediately for the cause. Vibration is generally a warning sign of trouble.
• Avoid accidental starting. Be sure the switch is off before transporting the
machine or performing any maintenance or service on the unit. Transporting or
performing maintenance or service on a machine with its switch on invites
accidents.
• Do not tamper with or disable safety systems.
• Only use manufacturer-recommended attachments.
• Before using, always visually inspect to see that the tools are not worn out or
damaged. Replace worn out or damaged elements and bolts in set to preserve
balance.
• Keep the machine in good operating condition. Operating the machine in poor
or questionable condition could result in serious injury.
• Be sure all safety devices are in working order and warning labels are in place.
These items are installed for your safety.
!
!

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Safety Information
Fuel Safety
• If you have spilled fuel, make sure you do not attempt to ignite the engine but move
the machine away from the area of spilled fuel and avoid creating any source of
ignition until the fuel has evaporated and fuel vapours have dissipated.
• When fuel is spilled on yourself or your clothes, wash your skin and change clothes
immediately.
• ALWAYS clean up spills promptly using absorbent granules and a lidded bin.
!
CAUTION! ALL FUELS ARE HIGHLY FLAMMABLE &
PETROL VAPOUR IS EXPLOSIVE. TAKE EXTREME CARE
WHEN HANDLING FUEL. KEEP FUEL OUT OF REACH OF
CHILDREN.
Spilled Fuel
!
• NEVER smoke when handling fuel.
• ALWAYS avoid inhaling fumes.
• ALWAYS carry fuel in the correct and clearly marked container.
• ALWAYS wear correct, suitable and fit for purpose Personal Protective Equipment (PPE),
suggested items are but not limited to safety gloves and overalls.
• To avoid sparking or arcing, keep grounded conductive objects such as tools away
from exposed, live electrical parts and connections. These events could ignite fumes or
vapours.
• Do not operate the machine with known leaks in the fuel system.
• Fire hazard - keep fuel away from all sources of ignition for example heaters, lamps,
sparks from grinding or welding.
• DO NOT carry out hot work on tanks that have contained fuel.
• ALWAYS keep the work area tidy.
• ALWAYS dispose of waste fuels correctly.
• Serious personal injury can occur when petrol is spilled on yourself or your clothes. Rinse
your skin and change your clothes immediately.
Fuel Information
!
Using E10 Petrol Important: This product must be used with high-quality unleaded fuel
ONLY. ALWAYS use automotive petrol/gasoline suitable for four-stroke engines; DO NOT
mix fuel and oil. It is recommended to use E10 (95 RON) automotive fuel, with an
appropriate additive or stabiliser in this product. Damage caused by failure to add fuel or
using incorrect or poor-quality fuel is not covered by your warranty. CAUTION! E10 petrol is
hygroscopic and attracts moisture, which may damage the fuel system if stored in the
product for more than four weeks. After draining the fuel tank, always run the engine until
the last of the fuel in the system is spent and drain the f loat bowl when the engine is cool.
E10 petrol should be used within 30 days of purchase. Some petrol brands contain other
quantities of ethanol. DO NOT use fuels with more than 10% ethanol in your Genpower
product. Always store and dispose of fuels responsibly and in accordance with local
regulations.

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Safety Information
Fuelling/De-Fuelling
• Store fuel in containers specifically designed and approved for fuel storage.
• Store fuel in a cool, well-ventilated area, safely away from sparks, open flames,
or other sources of ignition.
• Never store fuel or a machine with fuel in the tank inside a building where
fumes may reach a spark, open flame, or any other source of ignition (such as a
water heater, furnace, or clothes dryer). Allow the engine to cool before storing
in any enclosure.
• Replace all fuel tank and container caps securely and wipe up spilled fuel.
Never operate the unit without the fuel cap securely in place.
!
Storage
!
• ALWAYS fuel and de-fuel in a well ventilated area outside of buildings. Use a
funnel to add fuel, only outdoors. Do not smoke during this and each time fuel is
handled.
• Add fuel before igniting the engine, never remove the fuel tank cap or add
fuel whilst the engine is running or when it is hot.
• When de-fuelling ALWAYS use a proper fuel retriever.
• Never overfill the fuel tank. Engine heat can cause fuel to expand, never fill the
tank to more than 1/2” below the bottom of the filler neck. This will provide
space for fuel expansion.
• When refilling or draining the fuel tank, use an approved fuel storage container
while in a clean, well-ventilated outdoor area. While adding fuel or operating
the unit, do not smoke, and stay away from sparks, open flames, or other
sources of ignition near the area of operation.
• Always stop the engine and allow it to cool before filling the fuel tank. Never
remove the cap of the fuel tank or add fuel while the engine is running or when
the engine is hot.
• Loosen the fuel tank cap slowly to relieve any pressure in the tank.
• ALWAYS keep the handles dry, clean and free of oil and fuel.
• After fueling, ensure to tighten the cap securely.
• Never use the lock-function when filling with fuel.

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Safety Information
Work Area
• Keep people, children and animals away from the working area.
• Operate on flat, level ground.
• DO NOT use on wet ground. If there has been heavy rain on the working site,
wait until the ground has dried up.
• Never leave the machine in a place with unstable ground which could give
way.
• You must be careful near ravines, ditches or embankments.
• Do not operate in the rain, when there is a thunderstorm or lightning risk, at times
of strong or gale force winds, or at any other times when the weather conditions
might make it unsafe to use this product. If there is bad weather conditions, do not
use the machine.
• DO NOT the machine or connected electrical devices in explosive atmospheres,
such as in the presence of flammable liquids, gases or dust. Power tools may
create sparks, which may ignite the dust or fumes.
• This machine is only for use in well ventilated areas.
!

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Safety Information
During Use
• Do not operate the machine in confined areas where there may be a risk of
carbon monoxide poisoning
• You must switch off the machine:
- Before checking or working on the machine.
- When transporting the machine.
- Whenever you leave the area of the machine completely
- If the machine starts to vibrate abnormally.
• WARNING! If something breaks or an accident happens whilst working, you must
turn off the machine immediately and move the machine away to prevent further
damage. If an accident happens with injuries or third parties are injured, carry out
the first aid measures most suitable for the situation immediately and contact the
medical authorities for any necessary health care. Carefully remove any debris
that might cause damage or harm persons or animals should it not be seen.
• Keep any extension corda away from hot elements of the machine.
• Never operate the machine with damaged outer casing.
• Keep hands and feet away from the exhaust at all times when
The machine is running. This will cause burns
!

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Safety Information
Batteries (Where Present)
Batteries present a risk if they become damaged by the possible leaking of
electrolyte. This electrolyte is an acid and can cause serious burn injuries. Care
should be taken when working on or near them. NOTE: the electrolyte may be in a
liquid or gel form.
Should you come in to contact with electrolyte you should;
• Remove all clothing contaminated with electrolyte. If you cannot remove then
saturate them in water.
• Get medical assistance as soon as possible.
You must advise the medical staff of the type of acid.
You must advise the medical staff of the type of acid. This machine contains
LiFePO4 batteries with lipf6 electrolyte.
• Use fresh running water to wash off excess electrolyte, continue this until medical
assistance arrives. Make sure that you do not wash the electrolyte to another part
of your body or face.
• If electrolyte comes in to contact with Eyes the electrolyte needs to be
immediately washed away with large amounts of water. Make sure that you do
not wash the electrolyte to another part of your face or body.
• Gasses from charging batteries are highly flammable and great care should be
taken to charge in well ventilated areas.
• There is an explosion risk if the battery terminals are short circuited,
when connecting/disconnecting ALWAYS exercise great care so that
the terminals or battery leads are NOT allowed to touch and cause a
spark. ALWAYS use suitable insulated tools.
Electricity (Where Applicable)
DANGER : ELECTRICITY CAN KILL – NEVER WORK ON LIVE / ENERGISED EQUIPMENT.
!
!
• Prior to carrying out any maintenance work you MUST identify
electrical isolation methods and isolate all electrical supplies.
• Prior to use and with all electrical supplies isolated, you MUST check all
electrical cables, plugs and connectors for the following;
- Are intact and have no signs of damage, to include but not limited to bare wires,
chaffing, cuts and loose wiring.
- If there are any signs of damage, the damaged item MUST be taken out of
service until the damage has been repaired by an electrically competent person.
- All trailing cables should be routed so as not to cause any kind of trip hazard.
- NEVER work on or near electricity with wet hands, wet clothing and wet gloves.

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Safety Information
Electricity (Continued)
• Power tools plug must match the outlet. Never modify the plug in any way. DO
NOT use any adapter plugs with earthed (grounded) power tools. Unmodified
plugs and matching outlets will reduce risk of electric shock.
• DO NOT expose this power tool to rain or wet conditions. Water entering a power
tool will increase the risk of electric shock. DO NOT abuse the power cord. Never
use the cord for carrying, pulling or unplugging the power tool. Keep the cord
away from heat, oil and sharp edges or moving parts. Damaged or entangled
cords increase the risk of electric shock. When operating a power tool, use an
extension cord suitable for outdoor use. Use of a cord suitable for outdoor use
reduces the risk of electric shock.
• IMPORTANT: Make sure that the electric circuit is fused, and that the power,
voltage and frequency of the motor is supported by your mains supply. Also, make
sure that your power supply is earthed. Connect your machine to earth. Never
open the ON/OFF switchbox. However, if it should become necessary to do so,
contact a qualified electrician. Make sure that you will never touch live contacts,
specifically when you plug or unplug your machine. This machine and its power
cord must never get into contact with water.
• Avoid body contact with earthed or grounded surfaces such as pipes, radiators,
ranges and refrigerators. There is an increased risk of electric shock if your body is
earthed or grounded.
• To prevent electric shock, use only with an extension cord suitable for outdoor
use. For additional protection, the installation of a residual current device (RCD)
having a rated residual operating current not exceeding 30mA is advisable.
• Before use, check that the extension cord is in good condition. When using an
extension cord, make sure to use one heavy enough to carry the current your
product will draw. An undersized cord will cause a drop in line voltage resulting in
loss of power and overheating.
• Do not allow any part of the machine to make contact with water while it is in
operation. If the appliance becomes wet while turned off, wipe dry before starting.
Do not touch the appliance or its plug with wet hands or while standing in water.
Wearing rubber boots offers some protection.
• Before use, check the supply and extension cord for signs of damage or aging. If
the cord becomes damaged during use, disconnect the cord from the supply
immediately. If the supply cord is damaged, it must be replaced by the
manufacturer or a qualified person in order to avoid a hazard.
!

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Safety Information
Vibrations (Where Applicable)
• Prolonged use of hand held (operated) machines will cause the user to feel the effects
of/from vibrations. These vibrations can lead to white finger (Raynaud’s phenomenon) or
carpal tunnel syndrome. This condition reduces the ability of the hand to feel and regulate
temperature, causing numbness and heat sensations and may cause nerve damage and
circulatory tissue death.
• Not all factors that lead to white finger disease are known, but cold weather, smoking
and other diseases that affect blood vessels and blood circulation as well as large and
long-lasting impact of shocks are considered factors in the formation of white finger. Note
the following to reduce the risk of white finger and carpal tunnel syndrome;
• Wear gloves and keep your hands warm.
• Take regular breaks.
• All of the above precautions may help reduce the risk of white finger disease but not rule
out the carpal tunnel syndrome. Long-term and regular users are therefore recommended
to observe the condition of your hands and fingers. Seek medical attention immediately if
any of the above symptoms should occur.
Noise (Where Applicable)
• The operating noise of the machine can damage your hearing. When wearing
protection such as earplugs or ear defenders to protect your hearing. Long-term and
regular users are advised to have hearing checked regularly. Be especially vigilant and
cautious when wearing ear protection because your ability to hear alarm warnings will be
reduced.
• Noise emissions for this equipment is unavoidable. Carry out noisy work at approved
times and for certain periods. Limit the working time to a minimum. For your personal
protection and protection of people working nearby it is also advisable for them to wear
hearing protection.
• See Certificate of Conformity section for Outdoor Noise declaration of .
. conformity.
!
!
Residual Risks
Even when tool is used as prescribed it is not possible to eliminate all residual risk
factors. The following hazards may arise in connection with the tool’s construction
and design:
1. Damage to lungs if an effective dust mask is not worn.
2. Damage to hearing if effective hearing protection is not worn.
Health defects resulting from vibration emission if the power tool is being used over
longer period of time or not adequately managed and properly maintained.
WARNING! This machine produces an electromagnetic field during operation.
This field may under some circumstances interfere with active or passive medical
implants. To reduce the risk of serious or fatal injury, we recommend persons with
medical implants to consult their physician and the medical implant manufacturer
before operating this machine.
!
!

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Safety Information
Intended Use
The HY6250SEi is an Inverter Generators from Hyundai, ideally suited for 5000-5500W
outputs. It is powered by a 223CC 4-Stroke motor.
These machines are manufactured according to the latest safety requirements.
These include automatically overload protection and low oil shut off. Every
precaution is only effective when it is followed exactly.
Intended Use
This is intended for private use, i.e. for use in well ventilated areas for power
generations providing on the go power.
This machine is intended for use in environments with a maximum ambient
temperature of 32
o
C.
User Types
This machine is intended for use by consumers, i.e. non professional operators. The
machine is intended for “DIY” and domestic use only.
Improper Use
Any other usage not in keeping with the above mentioned ones may be
hazardous and harm persons and/or damage things. Examples of improper use
may include, but are not limited to:
- Power outputs over the specified maximum.
- Parallel use with non-identical generators
- Use involving large scale voltages
!

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Safety Information
Personal Protective Equipment
Appropriate Personal Protective Equipment (PPE), MUST be worn at all times when
operating or repairing the machine. No protective equipment can ensure 100%
protection.
When selecting PPE, make sure it’s CE marked and it suits the user in terms of size,
fit, etc. If more than one item of PPE is worn at the same time, make sure they can
be used together, e.g. wearing safety glasses may disturb the seal of a respirator,
causing air leaks.
!
Hand Protection Must Be Worn
Protective electrically non-conductive gloves are highly
recommended when working.
Foot Protection Must Be Worn
Non-skid heavy duty footwear are highly recommended when
working.
Hearing Protection Must Be Worn
Suitable safety hearing protection is recommended.
Eye Protection Must Be Worn
Always wear safety glasses/goggles and/or face shields. Everyday
eyeglasses have only impact resistant lenses; they are not safety
glasses/goggles.
Protective Clothing Must Be Worn
Do not wear loose clothing, gloves, scarfs, neckties or jewellery (rings,
wrist watches), which can be caught in moving parts.
Head Protection Must Be Worn
Wear a safety helmet with a safety visor.
Face Shield Must Be Worn
Wear a face shield to protect your face.

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Safety Information
Symbols On The Machine
We have provided safety messages in this manual and on the machine. This
information alerts you to potential hazards that could hurt you or others. Please
read these messages carefully. However, we may not have listed all of the possible
hazards, you must also use your own judgement.
!
To reduce the risk of injury, the user must read the
instruction manual
This symbol is used throughout this manual to warn the
user about potential risks. Please read & understand
these sections before using the device.
Personal Protective Equipment (P.P.E.) to be worn during
operation such as:
• Gloves and Hand Protection
• Safety Glasses and Eye Protection
• Ear Defenders for Sound Protection
• Protective Head gear
Waste Electrical and Electronic Equipment (WEEE) :
When disposing the machine you must conform to
WEEE regulations.
Exhaust Gas Warning : Exhaust Gas from this machine is
poisonous, NEVER operate in an unventilated area
Hot Surface Warning : During the operation of this
machine, it becomes dangerously hot. Allow to cool
before moving
Fire Risk Warning : Due to using flammable liquids, risk of
fire is always present. NEVER refuel during operation.
Proximity Warning : Ensure during operation a 4ft
boundary is observed.
Sound Warning : This machine exerts 97dB of noise
during operation. Ensure this is considered whilst
operating.
Detonation Warning : Prior to refuelling always turn off
the machine. After refuelling check for spilt fuel. NEVER
operate near open flames.
97

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Safety Information
Symbols On The Machine
We have provided safety messages in this manual and on the machine. This
information alerts you to potential hazards that could hurt you or others. Please
read these messages carefully. However, we may not have listed all of the possible
hazards, you must also use your own judgement.
!
Water Exposure Warning : Never allow the machines to
be exposed to rain or wet conditions.
Electrocution Warning : This machine is a potential
source of electrical shock. Never expose to moisture,
rain or snow. Do not operate with wet hands or feet.
Grounding Warning : Failure to properly ground this
machine can result in electrocution.
Ground Location : This shows suitable areas where the
machine can be connected to ground.
BREATHING IN CARBON MONOXIDE FUMES CAN CAUSE DEATH!
Using a generator indoors in an unventilated area CAN KILL YOU IN
MINUTES! The exhaust fumes from machines contain Carbon
Monoxide. This is a poisonous gas that you can’t see or smell.
• NEVER use inside a building with poor ventilation even IF the
doors and windows are open.
• NEVER use inside a confined space such as but not limited to a
house, garage, large vehicle, boat or tent.
• Never operate the machines near other machines which use
flammable liquids as a fuel source.
• Only use the machine outside far away from open windows,
doors and vents.
Carbon Monoxide Warning
!

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Unboxing
WARNING : Unboxing and assembling the machine should be done on a flat,
surface with enough room. Disposal of the packaging should be done in
accordance with the local regulations in force.
!
WARNING : Some of the packaging material may be harmful to children. Keep
out of reach of children.
1. Carefully remove the product from the packaging and examine it for any sign of
damage caused during shipping.
2. Lay the contents out and check them. If any part is damaged or missing, you
must not use the machine. Contact HYUNDAI POWER PRODUCTS immediately.
3. You must keep the packaging material in case the machine needs to be
returned or repaired.
4. Ensure that you have all the accessories and tools you need for assembly and
operation including the suitable personal protective equipment.
!

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18
Features
B
C
A
Descriptions on next page
H
G
F
D
E
L
K
J
I
O
N
M

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Features
A. Control Panel
B. Front Handle
C. Fuel Cap
D. Upper Handle
E. Fuel Gauge
F. Maintenance Panel
G. Choke Control & E-Start
H. Recoil Starter Handle
I. Wheel
J. Exhaust
K. Exhaust Panel
L. Rear Handle
M.Upper Maintenance Panel
N. Side Panel
O. Anti-Vibration Feet
P
Q R
S
U
T
V
X
Y
P. Digital Output
Q. AC Overload
R. Status Indicators
S. 32 amp AC Output
T. Ground Terminal
U. 16 amp AC Output
V. 12V DC Output
W. ECO Switch
X. DC Overload
Y. Reset Switch
W

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Pre-Operation Checks
Oil Level
• Remove side Maintenance panel
• Remove the oil filler cap
• Using a funnel or spouted container, fill the machine with 0.41L of oil. We
recommend using SAE 10W-30 grade oil for optimum performance.
ALWAYS ensure the machine is on level ground when filling/checking
the oil level. This will give the most accurate measurement.
!

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21
Pre-Operation Checks
Fuel Level
• Remove the fuel cap.
• Using a funnel or spouted container, carefully fill with fuel. We recommend
using 95 Octane premium fuel.
• In the top of the fuel tank is the Fuel Level Indicator, fill to level shown below.
ALWAYS ensure the machine is on level ground when fueling or
checking the fuel level. This will give the most accurate
measurement.
!
Fuel Cap
Max Fuel
Level
Full
Empty

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Pre-Operation Checks
Air Filter Check
• Remove the Maintenance Panel by removing the panel screws.
• Loosen the locking clamp on the Air Filter Cover
• Remove the Air filter and inspect for cleanliness. If any debris or blockages are
present clean or replace.
A dirty air filter will restrict air flow to the carburettor, reducing engine
and output performance
!
Panel Screws
Air Filter Clamp
Battery Connection
Behind the Maintenance Panel there are 2 halves of a connector which complete
the circuit for the negative terminal on the battery. Combine the 2 halves to
complete the circuit enabling the E-Start function.
Panel Screws
Battery
Negative Battery
Connections

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Pre-Operation Checks
Machine Grounding
During any form of operation, grounding the machine is always recommended.
This means connecting the machine to a reliable, dedicated ground via a wire
from the Ground Terminal on the main panel. Remove the bolt from ground point
and secure a suitable cable. Re-secure the bolt when cable is connected.
Grounding connection
Electrical Unloading
Before operating the machine, always ensure the machine is unloaded. This
means, ensure there are no external accessories which are powered by the
machine are connected.

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Operation
Starting
WARNING ! – YOU MUST READ AND UNDERSTAND THE WHOLE USER
MANUAL BEFORE OPERATING THIS MACHINE
!
WARNING ! – Your Generator must not be ran in wet condition i.e.
Raining or poolside. Always operate in a dry well ventilated area.
!
RUN
Pull Recoil Starter
E-Start
Button
•
Rotate the Choke Control into the Cold Start/CHOKE Position
•
For E-Start, press the E-start button for up to 10 seconds until the machine starts. If the
machine doesn’t start try 2 more times. If the machine still fails to start, follow the Recoil
start instructions.
•
For Recoil-Start, pull the Recoil Starter grip lightly until resistance is felt, then pull it briskly.
Do not allow the recoil starter grip to snap back against the engine. Return it gently to
prevent damage to the starter.
•
If the Choke Control was moved to the Cold Start/CHOKE position to start the engine,
move it to the RUN position.
•
IF restarting your machine, start it with the Choke Control into the RUN position instead of
Choke.

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Operation
Stopping
1. To turn off the machine, turn the Choke Control to the Off position. The
machine will slow down to a stop.
OFF
ECO Mode
When your machine is under a consistent load, you opt to put it into ECO mode.
This will make the machine run at the optimal RPM to supply your accessories and
save fuel.
ECO
Mode
Switch

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Operation
Connecting Appliances
The HY6250SEi has a rated power of 5000W. This is the maximum amount of power
the machine can supply, anything over this will cause the machine to stall, and
operate outside of stated specification. This can be dangerous and cause
damage to your machine.
Start your machine, when the Output Indicator Light is illuminated you can start to
connect your devices 1 at a time.
Using either the 230V or DC12V compatible socket, connect your socket into the
desired plug.
Your appliance should now be supplied with power and safe to use.
To disconnect an appliance, turn off it off and then disconnect.
NOTE* If using a suitable socket extension, ensure you follow the same procedure if
any additional appliances are connected. Listen to the tune of the engine, if it
changes from the previous running speed, disconnect your appliance. Also if your
appliance aren’t working as intended, this could be an indication the generator
can’t provide your requested power. Suitable extensions should be IEC245
compliant.
WARNING ! – ALWAYS ACCESS YOUR APPLIANCES ARE IN FULL
WORKING ORDER BEFORE CONNECTING. FAULTY OR DAMAGED
APPLIANCES ARE LIKELY TO CAUSE DAMAGE OR INJURY.
!
Output Indicator light

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Operation
Generator Status Indicators
The HY6250SEi have Output, Overload and Low Oil Warning indicator lights on the
Generator Monitor.
Output Indicator – The Output indicator will illuminate Green when the machine is
ready to be used. It will remain illuminated during operation.
Overload Indicator – The Overload Indicator will be illuminated Red when the
machine detects an overload or short circuited appliance. IF the Overload
Indicator is on, power to all outputs will be cut. In the event of this the machine will
still run but no longer output any power.
To restore power output, remove all connected appliances. Then hold the Reset
button for 1 second. If the Overload Indicator turns off and the Output Indicator
turns on, the machine is ready to resume operation.
IF the Overload Indicator stays Illuminated turn the machine off and check the
generator for any damage. If you have any queries, please contact us (contact
details on page x)
Low Oil Warning Indicator – The Low Oil Warning indicator will illuminate in the
event as insufficient amount of oil is detected. This will illuminate before the oil level
reaches a critically low amount. Please fill with the correct spec of oil to turn the
light off.
If you continue to run the machine with the Low Oil Warning light illuminated, it
can and will cut the machine from running. To rectify this fill with the correct spec
and amount of oil.
Output Indicator
Overload Indicator
Low Oil Warning Indicator

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Maintenance & Care
General Maintenance
WARNING : Turn OFF the machine, allow all moving parts to come to a
complete stop, and disconnect the power cord before maintaining the machine.
You need to wear proper clothing and protective gloves whenever your hands are
at risk.
• Keep all nuts, bolts and screws tight to be sure the machine is in a safe working
condition.
• Replace worn or damaged parts for safety. Only use manufacturer-
recommended parts and accessories.
• To keep your machine in good working condition, you can use spray lubricating
oil along the blade, on the top of the blade, and the bottom of the blade.
!
Storage
Keep the machine stored in a dry, level area away from damp, moisture and
rain fall. Allow the machine to cool down before storing.
• Make sure the machine is clean and dry before storing.
• Make sure the machine is stored away from direct sunlight. Store indoors or in a
safe, locked protected area during severe weather and winter months.
• Ensure the machine is stored in a position, where any persons cannot step on to
attempt to reach items up high, due to risk of movement.
• DO NOT store the machine near an ignition source, such as a wood stove, gas
or electric heater, or an appliance or heater with a pilot light.
• Store the machine out of reach of children or anyone who is not familiar with
operation.
• DO NOT stack other items on top of the machine when in storage.
!

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Maintenance & Care
Service Schedule
Item
Task
Each
Use
First 10
Hours
Every 50
Hours
Every
100
Hours
Every 300
Hours
Generator General
Inspection
Engine Oil Inspect Oil
Level
Change
Air Filter Inspection
Clean
Sediment cup Clean
Spark Plug Inspect &
Clean
Replace
Spark Arrestor Inspect &
Clean
Valve
Clearance
Inspect &
Adjust
Combustion
Chamber
Inspect &
Adjust
Fuel Tank &
Strainer
Clean
Fuel Line Clean Every 2 months (replace if necessary)
Exposed
Metal
Components
Clean After every use and before every start.
After engine break-in period (First 10 Hours) the oil must be changed
Change Engine oil every year or 100 hours, whichever comes first
NOTE – When using the machine in dusty and dirty areas, the service
intervals should be shorten to increase frequency
!
NOTE – Maintenance should be carried out by qualified technicians
or mechanical proficient persons.
!

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Maintenance & Care
Oil Maintenance
• To change the oil, firstly remove the Maintenance Panel.
• Open the Oil Filler Cap (1) and remove the engine sump bolt (2). With a suitable
container to in place, tilt the machine. It’s a good idea to use some absorbent
paper or an oil rag when doing this, to ensure no oil drips into the machine inner
casing. Tilt the machine until oil no longer comes out.
• Follow the instructions on Page 20 on how to replenish the drained oil.
WARNING – When changing the oil, ensure it’s warmed. If changing
the oil after more than 10 minutes of operation, allow the machine to
cool for a short period of time.
!
2
1
3
4
Max Oil Level
Min Oil Level

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31
Maintenance & Care
Air Filter Maintenance
• To clean the Air filter, firstly remove the Maintenance Panel.
• Loosen the Air filter clamp on the Air Filter cover and remove. The Air Filter
Element can now be removed.
• Clean the Air Filter Element with a suitable cleaning agent and allow to dry.
• Soak the Air filter element in clean engine oil. Then squeeze out any excess oil,
the filter shouldn’t be dripping with residual oil.
• Re-install the Air Filter element, Air filter cover and maintenance panel
WARNING – NEVER use petrol or Low Ignition point solvents for
cleaning. Being highly flammable they can cause fire or explosions
when the machine is turned on.
!
Panel Screws
Air Filter Clamp

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32
Maintenance & Care
Spark Plug Maintenance
1. Remove the Spark Plug Maintenance Panel.
2. Remove the sparkplug cap, and remove with a suitable spark plug
socket/wrench.
3. Inspect your sparkplug, if it’s dirty you can simply use a wire brush and a
suitable cleaning solution to remove any carbon deposits.
4. Using a feeler gauge, you can also check the Sparkplug gap. The gap must be
set at 0.6mm-0.7mm.
5. If your sparkplug insulation is cracked or chipped it needs replacing, replace it
with a BPR6HS specification replacement.
6. When replacing the sparkplug, ensure to be careful when reinstalling not to
cross thread.
0.6mm-0.7mm
Sparkplug
Maintenance Panel
Sparkplug Cap

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33
Maintenance & Care
Spark Arrestor Maintenance
There’s 6 screws that can be removed to get easy access to the Muffler and Spark
arrestor.
Remove the Muffler and Spark Arrestor. Using a soft bristle brush, clean the spark
arrestor, a cleaning fluid can be used to help aid the cleaning process.
WARNING – Allow the machine to fully cool down before carrying out
this maintenance step.
!

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Maintenance & Care
Transportation & Storage
Drain the fuel tank. Use a suitable siphon and fuel container to carry this out.
Drain the carburettor of any fuel. There’s a drain screw on the carburettor, loosen
this. Using a suitable container, place beneath the carburettor. Turn the Choke
Control into the choke position. The fuel should drain off.
Drain the engine oil using instructions from page 29.
Using instructions from page 32, remove sparkplug and through the sparkplug
location fill with 10ml-20ml of clean engine oil. Ensuring the sparkplug cap is off,
pull the recoil until you feel a slight resistance. This means both the intake and
exhaust valves are closed which is ideal conditions for long term storage
WARNING – Never store the machine long term or transport the
machine in a vehicle when it’s full of fuel and oil.
!
WARNING – When storing the machine long term, it should be in a
well ventilated area away from direct sunlight. High temperatures
can cause fuel to vaporise which is hazardous to health.
!

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Troubeshooting
Machine Troubleshooting
Fault Cause Action
The Machine doesn't Start
No fuel
Fill the oil tank with
gasoline
Choke control is not set to
Choke
Turn the fuel valve to
Choke
The Fuel valve is blocked Clean carb
No engine oil or the engine
oil level is low
Add oil
The engine switch is turned
off
Turn the switch to the
“on” position
The spark plug fails
Clean or replace the
spark plug (refer to
page 31)
There is no power output
The circuit breaker is in the off
position (DC12V only)
Turn the circuit breaker
to the “on” position
The plug is poorly contacted
Remove and refit the
plug.
The unit shudders during
operation
The choke lever position is
incorrect
Move the choke lever
to the “Run” position
during operation
The unit emits white smoke
The temperature of the
engine is too high, maybe
overloaded
Let the engine run
without load for more
than 10 minutes
The fuel is contaminated Use fresh clean fuel
The unit emits black smoke
The air filter is dirty
Clean the filter element
of the air filter
The load is too heavy
Reduce load to the
rated limit
The unit emits blue smoke
The engine oil is overfilled
Drain oil to correct level
The engine oil type is
incorrect
Choose appropriate
engine oil model
The Power Decreases over
time
The spark plug fails
Clean or Replace Spark
Plug
The valve clearance are out
of adjustment
Adjust the Valve
Clearances

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36
Troubeshooting
HY6250SEi Wiring Diagram

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37
Technical Data
Specification
Model HY6250SEi
Engine Spec 4-Stroke OHV Single cylinder air cooled.
Engine Displacement (cc) 223cc
Engine Speed (RPM) 4800
Ignition System TCI
Spark Plug F7RTC
Spark Plug Gap 0.024-.0.028 inches / 0.6-0.7mm
Starting System Recoil
Fuel Type Unleaded Petrol
Oil Capacity (L) 0.65
Oil SAE 10W30
Frequency 50/60Hz
Rated Voltage 230/240V
Rated Current (W) 5000
Peak Output (W) 5500
Running Output (W) 5000
DC Ouput 12V 8.3A
Fuel Tank Volume 11L
Continuous Running Time 3.8
Sound Power Level @ 7 metres 95
Sound Level (LWA) 97
Sound Level (LpA) 77
Dimensions mm (LxWxH) 590x390x545
HY6250SEi Net Weight (kg) 39.5

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Recycling & Disposal
Recycling & Disposal
We do not offer a takeback scheme for the recovery of Waste Electrical Electronic
Equipment (WEEE) & Batteries. Instead the responsibility to dispose of WEEE and/or
Batteries is passed onto you by us.
So when it becomes necessary to dispose of your machine you must take it to your
local Civic Amenity Site. For further information please contact your local Authority
for disposal advice.
You MUST make sure that all unused oil and fuel is disposed of correctly either
beforehand or at your local Civic Amenity Site.
• Under NO circumstances must any fuel or oil be put down any drains.
• Certain products contain WEEE waste which should not be disposed of in your
domestic waste.
• You MUST recycle WEEE in accordance with your local authority or recycling
centre.
• Certain products contain batteries which should not be disposed of in your
domestic waste.
• You MUST recycle batteries in accordance with your local authority or recycling
centre.
• Unwanted packaging and materials should be stored and taken to a recycling
centre so it can be disposed of in a manner which is compatible with the
environment.
We are a Member of the VALPAK National Compliance Scheme and our
registration number is RM08660. For further information about disposal please
contact your Local Authority.
You can also get more advice and guidance about recycling at the following
website http://www.recycle-more.co.uk
Should you pass this product on to another user either sold or loaned, you MUST
pass on this user manual. This will make sure that all other users can use and
maintain this machine safely.
1. Environmental protection should be a priority of considerable importance when
using the machine, for the benefit of both social coexistence and the environment
in which we live. Try not to cause any disturbance to the surrounding area.
2. You must comply with local regulations and provisions for the disposal of
packaging, oils, fuel, filters, damaged parts or any elements which have a strong
impact on the environment. This waste must not be disposed of as normal waste. It
needs to be separated and taken to specified waste disposal centres where the
material will be recycled.
3. You must comply with local regulations for the disposal of waste materials after
mowing.
4. When disposing, do not pollute the environment with the machine, but hand it
over to a disposal centre, in accordance with the local laws in force.
Environmental Protection

Declaration Of Conformity
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39
Importer and Authorised Representative
Genpower Ltd
Isaac Way, Pembroke Dock, SA72 4RW
Country of Origin: China
Description: Petrol Inverter Generator
SKU Code: HY6250SEi
Date of Issue: 01/11/2025
This declaration is issued under the sole responsibility of Genpower Ltd.
We hereby declare that the machine detailed in this declaration complies to all the
relevant provisions of the following EC directives and regulations
Regulations and Directives of Compliance
• 2006/42/EC Machinery Directive
• 2014/30/EU Electromagnetic Compatibility Directive
• 2016/1628/EC The Emission of Gaseous and Particulate Pollutants from Internal Combustion
Engines
• 2000/14/EC Noise Emissions in the Environment by Equipment for use Outdoors
REFERENCES TO THE RELEVANT HARMONISED SAFETY STANDARDS USED OR REFERENCES TO
THE OTHER TECHNICAL SPECIFICATIONS IN RELATION TO WHICH CONFORMITY IS DECLARED:
• EN 55012:2007+A1:2009
• EN IEC 61000-6-1:2019
• EN ISO 8528-13:2016
• EN ISO 3744:1995
• ISO 8528-10:1998
Statement of Declaration
We the importer and authorised representative of the product described confirm
conformity within the provisions of applicable regulations and directives listed within this
document.
Signed on Behalf of Genpower Ltd
Place of Issue: Genpower Ltd
Signatory Name: Roland Llewellin
Position: Managing Director
……………………………………

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Useful Information
Check Out Our YouTube Channel
Our videos on YouTube include:
• Unboxing
• Assembly of your machine
• How to service your machine
• Products in use
• ‘How To’ videos
• Product features
Go to YouTube and search ‘Hyundai Power Products’.
Manual Updates
Our manuals are constantly being reviewed and updated. Should you find an
error, omission or something unclear, please contact us for assistance. We reserve
the right to make any modifications without prior notice whenever necessary.
Our latest manuals are also placed online. All our manuals can be downloaded at:
www.hyundaipowerproducts.co.uk
Returning Your Product
If you are returning your product, please contact the dealer for their returns policy.
Leaving A Review
We work very hard to give all of our customers the best possible service. If you have
any problems, before leaving negative feedback, please contact us to give us a
chance to resolve the issue. We would be delighted if you left us positive
feedback! To leave a review, please go to:
uk.trustpilot.com/review/hyundaipowerequipment.co.uk
Ordering Spare Parts
You can find the spare part you are looking for at power-spares.co.uk
Warranty
Proof of purchase will be required before you make a warranty claim. Full warranty
terms and conditions can be found on the HYUNDAI POWER PRODUCTS website:
www.hyundaipowerproducts.co.uk

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41
Product Record
Information
As soon as you have purchased the machine, we recommend that you fill out the
following. If you need to contact an authorised dealer or customer service for
information on servicing, you may need to provide the following information.
Date Of Purchase:……………………………………………………………………………….....
Dealer Name:………………………………………………………………………………………..
Dealer Phone:…………………………………………………………………………………….....
Model Number:…………………………………………………………………………………......
Serial / Batch Number:………………………………………………………………………........

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Contact Us
Need Help? Talk To Our Experts
Our friendly aftersales team will be more than happy to help you.
Phone
Call our team on 01646 687 880
Email
aftersales@hyundaipowerproducts.co.uk
Online Live Chat
Go to www.hyundaipowerproducts.co.uk
Post
Genpower Ltd, Isaac Way, Pembroke Dock, Pembrokeshire, SA72 4RW.
Hyundai Support Website
Go to hyundaisupport.co.uk

For Inquiries, Please Contact:
GENPOWER LTD
Isaac Way, London Road,
Pembroke Dock, UK, SA72 4RW.
T: +44 (0) 1646 687 880
E: info@hyundaipowerproducts.co.uk
www.hyundaipowerproducts.co.uk
Imported / Distributed by Genpower Ltd for
the United Kingdom & Ireland
Licensed by Hyundai Corporation Holdings, Korea
