Hyundai H740E User manual

GASOLINE ENGINE
H740E
H740ET

·1·
PREFACE
Thank you for choosing general gasoline engine of our company.
The manual gives information with respect to operation and maintenance
of 740 general gasoline engine, and be sure to read it carefull
operation. Only operate as the manual tells, can insure user’s safety and
get the best results of the engine operation. If a problem should arise or if
you have any questions about your gasoline engine, consult an authorized
our company servicing dealer.
Vertical shaft gasoline engine series in this manual is mainly used in the
UTV, generator and high pressure washer.
All information and diagrams of this manual are in accordance with the
newest products at the publishing time. If revision and other change of
the information descried in this manual are a little different from the
actual status, our company will explain it. Our company reserves the right
to make change at any time without notice and without incurring any
obligation. No part of this publication may be reproduced without written
permission.
This manual should be considered a permanent part of the engine and
should remain with the engine if resold.

·2 ·
SAFETY MESSAGES
Your safety and the safety of others are very important. We have provided
important safety messages in this manual and on the gasoline engine.
Please read these messages carefully.
A safety message alerts you to potential hazards that could hurt you or
others. Each safety message is preceded by a safety alert symbol
and one of three words: DANGER, WARNING, or CAUTION. These
mean:
You CAN be KILLED or SERIOUSLY HURT if you
don’t follow instructions.
You CAN be KILLED or SERIOUSLY HURT if you
don’t follow instructions.
You CAN be HURT if you don’t follow instructions.
Your engine or other property could be damaged if you
don’t follow instructions.

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CONTENTS
I. SAFETY PRECAUTIONS ………………………………………… 4
II . PARTS DESCRIPTION ………………………………………… 6
1)FEATURE ……………………………………………………… 6
2)MODEL & SERIES NO………………………………………… 7
III. PRE-OPERATE INSPECTION ……………………………………… 8
1) ENGINE OIL …………………………………………………… 8
2) AIR CLEANER ……………………………………………… 11
3) BATTERY CONNECTION ………………………………… 12
IV. STARTING THE ENGINE …………………………………… 13
V. RUNNING THE ENGINE ……………………………………… 14
VI. STOPPING THE ENGINE …………………………………… 15
VII . EXHAUST CONTROL SYSTEM SERVICE ……………… 16
1)MAINTENANCE …………………………………………… 16
2)REPLACING PARTS………………………………………… 16
3)TAMPERING AND ALTERING …………………………… 16
4)PROBLEMS AFFECTING EXHAUST EMISSIONS ……… 17
VIII. MAINTENANCE …………………………………………… 18
1)MAINTENANCE SCHEDULE……………………………… 18
2)MAINTENANCE METHOD………………………………… 19
IX. TRANSPORT AND STORAGE ……………………………… 22
X. TROUBLESHOOTING ……………………………………… 23
XI. SPECIFICATIONS …………………………………………… 27
XII. ELECTRIC DIAGRAM ……………………………………… 28
XIII. EASY WORN PARTS AND ACCESSORIES LIST ……… 29
CONTENTS

·4 ·
I. SAFETY PRECAUTIONS
Indicate a possibility of invalid warranty and personal
or equipment damage if instructions are not followed.
Please pay special attention to the followings:
1. Strictly set the engine according to the regulated power on the owner's
manual. Do not overload, overspeed the engine or run it with low load
and at low speed in a long time.
2. Use specified grade of gasoline. The fuel should be fully deposited
and filtrated before use. Keep clean the fuel filler, change the oil
periodically.
3. Periodically check the installation, connection and the degree of
4. Periodically clean the element of the air cleaner, change it when
necessary.
5. The engine is air-cooled, so clean the radiator, fan cover and fan in
time in order to make the engine cool normally.
6. The operator should be familiar with the working principle and
structure of the gasoline engine, knowing how to make an emergent
stop and the operation of all controlling parts. Any one without
training is forbidden to operate the engine. Keep periodical
maintenance. Solve problems in time. Do not run the engine in spite
of malfunction.
7. Running the engine in a well -ventilated place, keep it at least one
meter away from building walls or other equipments, keep away from
SAFETY PRECAUTIONS

·5 ·
8. Refuel in a well-ventilated area with the engine stopped, and in places
9. Refuel the fuel tank not too full so as to avoid fuel’s spilling out.
If there is spilled fuel around, be sure to clean it thoroughly before
starting.
10. Do not run the engine in airtight or ill-ventilated places.
the engine stops. Never touch it, or you may get burns. Transport or
store the engine with it cooling down entirely.
12. Safe warning label:
Please carefully read warning label before operating. Our company
will not assume any responsibility for person hurt, or equipment
damaged caused by disregarding this warning label.
SAFETY PRECAUTIONS

·6 ·
II. PARTS DESCRIPTION
1. FEATURE
PARTS DESCRIPTION
MUFFLER
SHROUD ASSY.
SHROUD SHIELD
RADIATOR
LUG
DECORATIVE BOARD
AIR CLEANER
OIL FILTER ASSY
STARTING MOTOR
SOLENOID SWITCH
OIL DIPSTICK
SPARK PLUG
LUG

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2. MODEL & SERIES NO.
MODEL
SERIAL NO.
FINISHED PRODUCT NO.
PARTS DESCRIPTION
740
XXX-XXXXXXXXXX
XXXXXXXXXXX

·8 ·
III. PRE-OPERATE INSPECTION
1. ENGINE OIL
Engine oil is a key factor in deciding the engine’s performance. Do
not apply engine oil with additives or 2-stroke gasoline engine oil,
because they haven’t enough lubrication, and may shorten the engines
service life.
Check the engine with it stopped on a level ground.
or equivalent, and always check API service label on the oil container
to be sure it includes the letters SJ or equivalent.
Check method:
1) Remove the dipstick and clean it.
check oil level.
3) If the oil level is too low, add the recommended engine oil up to the
oil upper level.
ENGINE OIL CAPACITY: 1.6L
ENGINE OIL RECOMMENDED: SAE10W-30
PRE-OPERATE INSPECTION
SAE
environment temperature

·9 ·
4) Reinstall the dipstick.
Engine oil change:
Used engine oil may cause skin cancer if repeatedly left
in contact with the skin for prolonged periods. It is still advisable to
thoroughly wash your hands with soap and water as soon as possible after
handling used oil. Please dispose of used engine oil in a manner that is
compatible with the environment.
1)Screw the oil dipstidck out.
DRAINING PORT
FLAT WASHER
OIL UPPER LIMIT
OIL DIPSTICK
OILING HOLE
ASS E M B L I N G
ON THE OILING
HOLE
OIL LOWER LIMIT
ASSEMBLING ON THE
DRAINING OIL PORT
PRE-OPERATE INSPECTION
OIL PLUG
SEALING RING
OIL DRAIN PLUG

·10 ·
2. AIR CLEANER
Never run the engine without an air cleaner, or severe wear
of the engine may be resulted in.
Remove the fan cover decorating plate
Remove the air cleaner housing.
Remove foam element or paper element, paying attention to prevent
dust and foreign matter entering into air cleaner.
Check, clean or replace damaged air cleaner parts.
Check, clean or replace damaged air cleaner parts.
AIR CLEANER SEAT GASKET CLASPER AIR CLEANER CASE
PRE-OPERATE INSPECTION
INTAKE TUBE
COVER
H E X . F L A NGE B O LT –
SMALL SER. M6×35(2PCS)
ELEMENT ASSY
LOCKING NUT ASSY
DECORATIVE BOARD
LOCKING LEVER ASSY

·11 ·
3. BATTERY CONNECTION
Use 12V and more than 18A.H battery, connect its positive lead to start
relay terminal while connect its negative lead to engine mounting screw,
base screw or other grounding point with the engine.(See Fig. 2)
Check the battery's connecting point; make sure that it is tight and not
rusted. If rusted, clean and connect. Apply the grease on the end and
connector lug.
1. The battery may give off explosive gas, keep sparks, flames and
cigarettes away. Charge or use it indoors with good ventilation.
2. The battery contains sulphuric acid (electrolyte). Contact with skin
or eyes may cause severe burns. If electrolyte gets in your skin,
15 minutes and call a physician at once.
3. Electrolyte is poisonous. If swallowed, drink large quantities of
BATTERY
CONNECT TO
TERMINAL PRODUCT RECTIFIER
PRE-OPERATE INSPECTION

·12 ·
water or milk, and follow with milk of magnesia or vegetable oil
and call a physician.
4. Keep out of reach of children.
1. Do not add tap water to the battery instead of distilled water,
otherwise the battery service life will be shortened.
2. Do not add distilled water over electrolyte upper level mark, if not,
electrolyte will spill out to corrupt the engine part. If so, be sure to
wash them away with water.
3. Make sure not to connect the battery leads in reverse order, or
short-circuit or breaker’s trip may be resulted in.
PRE-OPERATE INSPECTION

·13 ·
IV. STARTING THE ENGINE
1)Before starting the engine, check each pre-operation check steps
above mentioned, don’t start the engine until all requirements above
mentioned are met with.
2)Check the choke for CLOSE position.
3)Switch on the power supply and start the engine.
STARTING THE ENGINE

·14 ·
V. RUNNING THE ENGINE
After starting, move the choke lever toward fuel tank direction to make
the choke at “OPEN” position
The engine speeds is adjusted well in the factory, so the engine can
run at specified speed after starting. Don’t adjust the speeds by
yourself with any purpose or it will hurt the person and damage the
engine. If needing to adjust the speeds, please contact our company
authorized dealer. Otherwise user have a special tool and repaired
ability.
RUNNING THE ENGINE

·15 ·
VI. STOPPING THE ENGINE
After removing engine load, can directly turn the terminal-products stop
switch to “O” position or“STOP”position for stopping engine.
Don’t stop the engine when the engine is running with maximum
load at high speed to avoid the engine damaged.
STOPPING THE ENGINE

·16 ·
VII. EXHAUST CONTROL SYSTEMSERVICE
With the engine running, carbon monoxide, oxide of nitrogen and
hydrocarbon will produce, and in certain conditions, oxide of nitrogen
and hydrocarbon will react chemically each other to make smoke while
carbon monoxide is toxic, so exhaust control of them is very important.
The company decreases the exhaust emissions by introducing poor-fuel
carburetors and other devices into the engine to solve the problem.
To keep the exhaust of your engine with in the standard exhaust emission,
pay attention to the followings:
1. Maintenance
Maintain the engine periodically in accordance with the maintenance
schedule in the manual. The maintenance schedule is made out on the
base of normal use in normal conditions, if using under heavy load, dusty
or wet circumstances or in high temperature, service of the engine should
be done more often.
2. Replacing Parts
To ensure the best quality and reliability, use only new genuine our
company parts or their equivalents for repair and replacement.
3. Tampering and Altering
Tampering with or altering the emission control system may increase
emissions beyond the legal limit. Among those acts that constitute
tampering are:
EXHAUST CONTROL SYSTEM SERVICE

·17 ·
1) Removal or alteration of any part of the intake, fuel, or exhaust
systems.
2) Altering or defeating the governor linkage or speed-adjusting
mechanism to cause the engine to operate outside its design parameters.
4. Problems Affecting Exhaust Emissions
2)Engine speed is unstable.
3)Muffler exhausts black smoke, blue smoke or fuel and oil consume
abnormal.
5)Too early ignition.
EXHAUST CONTROL SYSTEM SERVICE

·18 ·
VIII. MAINTENANCE
1. MAINTENANCE SCHEDULE
In order to keep the engine well, must periodically service and adjust
the engine. Service shall be as following schedule.
Frequency
Item Each time
First
month or
20 hrs
Each
season or
50 hrs
Every 6
month or
250 hrs
Each year
or 300 hrs
Engine oil
Oil level check
Replace
Air cleaner
Check
Clean–replace
Spark plug
Clean, adjust
Replace
Oil strainer Replace
Valve clearance Check-adjust
Cylinder head Clean
• Service more frequently when used in dusty areas.
MAINTENANCE

·19 ·
2.MAINTENANCE METHOD
1. Replacement of engine oil
Drain the engine oil rapidly and completely out when the engine is hot.
1) Remove the oil dipstick, drain plug and washer and drain engine oil
thoroughly. Reinstall the drain plug and screw in it securely.
2) Fill the recommended engine oil and check oil level with oil dipstick.
3) Reinstall the oil dipstick and tighten it securely.
Please dispose of used engine oil and the oil containers in a
manner that is compatible with the environment. We suggest you take
used oil in a sealed container to your local recycling center or service
station for reclamation. Do not throw it in the trash or pour it on the
ground or down a drain.
2. Maintenance of air cleaner
A dirty or damaged air cleaner will allow dust entering into the engine,
causing rapid engine wear. So, service the air cleaner in time.
• Remove the bolt and air cleaner cover. Be careful to prevent dirt and
debris from falling into the air cleaner base opening,
• Remove the foam element or paper element.
• Check, clean or replace the damaged air cleaner parts.
• Reinstall the air cleaner parts, then bolt and screw down it.
Never clean the air cleaner element with gasoline or low
with compressed air or lightlytap off dust and neverdry to brush .
MAINTENANCE