Hyundai HWP Series User manual

HWP & HWT SERIES
Manual

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HWP & HWT SERIES
The engine exhaust from this product contains chemicals known
to cause cancer, birth defects or other reproductive harm.
©2023 Hyundai Power Equipment. All Rights Reserved.
Licensed by Hyundai Corporation Holdings, Korea.
HWP_Manual_EN_2023-09-22
HWP & HWT SERIES

2HWP & HWT SERIES
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THIS PRODUCT MEETS ALL CERTIFICATION REQUIREMENTS FROM:
READ THIS ENTIRE GUIDE BEFORE USING THIS
PRODUCT AND SAVE FOR LATER USE.
This user guide contains important instructions including
safety, setup, operation, and maintenance that must be
followed. All information in this guide is based on information
available at the time of print. This guide or revised editions
can be found on our website for download. No part of this
publication may be reproduced without written permission.
Thanks for choosing the HWP & HWT Series!
You're excited to get started, we'll keep this brief.
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HWP & HWT SERIES

4HWP & HWT SERIES
TABLE OF CONTENTS
1. Safety 5
2. Learn About Your Water Pump 9
2.1 Component Identification (HWP150) 9
2.2 Component Identification (HWP270 and HWP370) 10
2.3 Component Identification (HWT370) 11
2.4 Identification of Controls 12
2.5 Make Sure You Have Everything 14
3. Pre-Operation Check 15
3.1 Check the Oil Level 15
3.2 Check the Fuel Level 17
3.3 Prep the Air Filter 18
3.4 Hose Connections 19
4. Using your Pump 20
4.1 Pump Placement 21
4.2 Priming Water 24
4.3 Starting the Pump 25
4.4 Stopping the Engine 28
5. Maintenance 31
5.1 Maintenance Schedule 31
5.2 Changing the Oil 32
5.3 Air Filter Service 34
5.4 Spark Plug Service 35
5.5 Fuel Sediment Cup Service 36
5.6 Fuel Drainage 37
5.7 Spark Arrester Service 38
5.8 Cleaning 39
5.9 Transportation 40
5.10 Storage 40
5.11 Carburetor Modification for High Altitude Operation 41
6. Troubleshooting 43
7. Specifications 44
8. Pump Assembly 45
9. Limited Warranty 46

1. SAFETY
DANGER!
Using a water pump indoors can kill you in minutes.
The engine exhaust from this product contains chemicals known to cause
cancer, birth defects or other reproductive harm.
1.1 SAFETY WHILE OPERATING YOUR ENGINE
WARNING!
Always perform an oil, fuel and air lter check before starting the engine.
Properly clean and maintain the equipment.
Operate the engine according to instructions for safe and dependable
service.
Before operating the water pump, read the user guide carefully.
Otherwise, personal injuries or equipment damage may occur.
Never run the water pump in an enclosed area to avoid harm from
exhaust emissions of poisonous carbon monoxide gas.
Be careful not to touch the exhaust system, compressor pump or
discharge tubing during operation due to risk of burns.
Pay attention to the warning labels. The engine exhaust system will
become heated during operation and remain hot immediately after the
engine is stopped.
Gasoline is a highly ammable and explosive liquid. Refuel in a well
ventilated area with the engine stopped.
Use of gasoline with an ethanol content greater than 10% can damage
the engine and fuel system and will void the manufacturer’s warranty.
When refueling the water pump, keep it away from cigarettes, open
ames, smoke and/or sparks.
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HWP & HWT SERIES

Place the pump at least 5 feet away from buildings or other equipment
during operation.
Run the pump on a level surface. Tilting the water pump may result in fuel
spills.
Know how to stop the water pump quickly and understand operation of
all the controls. Never permit anyone to operate the water pump without
proper instructions.
Keep children, pets and machinery with rotating parts away during
operation.
Do not operate the water pump in rain or snow.
Do not allow any moisture to come in contact with the water pump.
Do not touch the spark plug while the engine is operating or shortly after
the engine has been shut down.
1.2 SAFETY WHILE OPERATING YOUR WATER OR TRASH PUMP
WARNING!
The water pump must not be operated by anyone under the age of 16.
When operating the water pump, keep small children away from the area
of operation.
Never operate the engine when transporting the unit.
Never operate the water pump if you are tired or if you are under the
inuence of alcohol, drugs, colorado river toads, medication or any other
substance that could affect your ability or judgment.
Do not use the water pump to work with ammable liquids such as
gasoline.
Do not use the water pump to work with caustic liquids such as used oil,
milk or wine.
Do not pump liquids and/or chemical solutions such as sea water which
may cause corrosion.
Keep the working water pump at least 1.5 meters away from any static
objects such as cars or buildings in order to ensure proper ventilation and
prevent re hazards.
Never place ammable material close to the engine mufer.
Never overturn the water pump when storing or transporting. Overturning
will cause leakage of vital liquids.
Never smoke or light res near the unit.
Never make unauthorized attachment installations.
Always disconnect the spark plug wire before performing any
6HWP & HWT SERIES

maintenance work.
Always keep the unit as clean as possible. Keep it free of loose
vegetation, mud, etc.
Always be ready to stop the unit immediately if it suddenly begins to
vibrate or shake. Inspect for broken, missing or improperly installed parts.
Never refuel the water pump while the engine is running. Gasoline is very
ammable and may ignite when in contact with hot engine parts.
1.3 MAINTENANCE SAFETY
WARNING!
Use rubber gloves when coming into contact with engine oil.
After any maintenance is performed, wash hands immediately using soap
and clean water because repeated exposure to lubricant may cause skin
irritation.
Do not clean the lter element with ammable liquids like gasoline
because an explosion may occur.
Turn off the engine before performing any maintenance. Otherwise it may
cause severe personal injury or death.
Allow the unit to cool down before performing any maintenance.
Always wear safety glasses when cleaning the unit with compressed air.
Do not clean with a pressure washer because it can cause damage.
Always stop the water pump before removing the oil ller cap.
Only qualied maintenance personnel with knowledge of fuels, electricity,
and machinery hazards should perform maintenance procedures.
Lubricate all exposed metal parts regularly. See maintenance schedule
for more details.
1.4 OTHER SAFETY TIPS
WARNING!
TOXIC FUMES HAZARD. Running engines give off
carbon monoxide, an odourless poisonous gas
that can cause nausea, fainting, or death. Do
not start engine indoors or in an enclosed area,
even if the windows and doors are open.
DANGER TOXIQUE. Faire fonctionner un moteur dégage de
l’oxyde de carbone, un gaz inodore toxique qui peut
provoquer la nausée, évanouissement ou la mort. Ne
démarrer pas le moteur à l’intérieur ou dans une espace clos,
meme si les fenêtres et les portes sont ouvertes.
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HWP & HWT SERIES

To avoid breathing in poisonous carbon monoxide from the exhaust
gases, adequate ventilation should be provided if the engine is running in
a partially enclosed space.
Water and trash pumps vibrate in normal use. During and after use,
inspect the entire unit as well as water hoses and power supply cords
connected to it for damage resulting from vibration. Have damaged
items repaired or replaced as necessary. Do not use plugs or cords that
show signs of damage such as broken or cracked insulation or damaged
blades.
When storing gasoline or equipment with fuel in tank: store away from
furnaces, stoves, water heaters or other appliances that have a pilot light
or other ignition source because they can ignite gasoline vapors.
NOTE
If you start to feel sick, dizzy, or weak after the unit has been running,
move to fresh air RIGHT AWAY. See a doctor. You could have carbon
monoxide poisoning.
8HWP & HWT SERIES

2. LEARN ABOUT YOUR WATER PUMP
This section will show you how to identify key parts of your water/trash pump. Going
over the terminology below will make sure we’re on the same page.
2.1 COMPONENT IDENTIFICATION (HWP150)
Fuel Filler Cap
Muffler
Suction Port
Pump Drain Cap
Discharge Port
Priming Water
Filler Cap
Recoil Starter
Ignition Switch
Air Cleaner
Choke Lever
Oil Filler Cap
& Dipstick
Oil Drain Plug
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2.2 COMPONENT IDENTIFICATION (HWP270 AND HWP370)
Discharge Port
Fuel Filler Cap
Recoil Starter
Oil Filler Cap & Dipstick
Priming Water Filler Cap
Ignition Switch Suction Port
Muffler
Frame
Pump Drain Cap
Oil Drain Plug
Air Filter Housing
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2.3 COMPONENT IDENTIFICATION (HWT370)
Ignition Switch
Suction Port
Pump Cover
T-Handle Bolt
Muffler
Frame
Pump Drain Cap
Oil Drain Plug
Discharge Port
Fuel Filler Cap
Air Filter Housing
Recoil Starter
Oil Filler Cap & Dipstick
Priming Water Filler Cap
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HWP & HWT SERIES

2.4 IDENTIFICATION OF CONTROLS
Fuel Valve Lever
The fuel valve opens and closes the passage between the fuel tank and
the carburetor. The fuel valve must be in the ON position for the engine
to run. When the engine is not in use, leave the fuel valve lever in the OFF
position to prevent carburetor ooding and to reduce the possibility of
fuel leakage.
Choke Lever
The choke lever opens and closes the choke valve in the carburetor. The
CHOKE (closed) position enriches the fuel mixture for starting a cold
engine. The RUN (open) position provides the correct fuel mixture for
operation after starting, and for restarting a warm engine.
ONONOFFOFF
RUNRUN
CHOKE
CHOKE
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Ignition Switch
The ignition switch must be in the RUN position for the engine to run.
Turning the ignition switch to the STOP position stops the engine.
Throttle Lever
The throttle lever controls the engine speed. Moving the throttle lever in
the directions shown makes the engine run faster or slower. Pump output
is controlled by adjusting the throttle lever. At MAX throttle position the
pump will deliver the highest output of volume. Moving the throttle lever
towards the MIN position will decrease the output volume of the pump.
RUNRUN
STOP
STOP
MINMIN
MAX
MAX
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HWP & HWT SERIES

Recoil Starter Grip
Pulling the recoil starter grip operates the recoil starter to crank the
engine.
Low Oil Shutdown Feature
This feature is designed to prevent engine damage caused by an
insufcient amount of oil in the crankcase. The sensor will automatically
stop the engine before the oil level in the crankcase falls below a safe
limit (the ignition switch will remain in the RUN position). If the engine
stops and will not restart, check the engine oil level.
2.5 MAKE SURE YOU HAVE EVERYTHING
Make sure your water pump has everything listed in the table below.
Part Name Quantity
Water Pump 1
User Guide 1
Spark Plug Wrench 1
Oil Funnel 1
Intake Strainer 1
Hose Coupler 2
Hose Coupler Rings 2
Rubber Seals 2
Hose lamps 3
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3. PRE-OPERATION CHECK
Inspect all components for damage and to ensure that none are missing. If you
require a replacement, do not operate this tool until all parts are present and in proper
working order.
NOTE
Do not modify or create accessories for this equipment. Using modied
components may result in damage and may void the warranty. Contact
customer service if you suspect that this equipment has been tampered
with.
3.1 CHECK THE OIL LEVEL
1. Ensure the pump is on a level surface.
2. Unscrew the oil cap and clean the dipstick.
3. Check the oil level by reinserting the oil cap without rethreading it. Remove
the oil cap and examine the oil level on the dipstick. If the oil level is at or
below the minimum, ll the oil reservoir up to the edge of the oil ll hole.
4. Reinsert the oil cap and tighten securely.
NOTE
HWP150 oil capacity is: 350ml.
HWP270, HWP370 and HWT370 oil capacity is: 600ml.
DO NOT OVERFILL.
MAX. LEVEL
MIN. LEVEL
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



0 10 20 30 40 50-10-20-30
20 40 60 80 100 120
°C
°F0-20
5W-30
10W-40
10W-30
Synthetic 5W-30
Effective Viscosity Range of Engine Oils
NOTE
SAE10W-30 is recommended for general use. Other viscosities may be
used based on the average temperature range as shown.
Do not tilt the water pump when adding engine oil. This could result in
overlling and damage to the engine.
Use high quality 4-stroke engine oil, certied to meet or exceed API
standard SG, SF, SAE ratings with strong detergents. Using non-
detergent or 2-stroke oil could shorten the engine’s working life.
Do not mix different engine oils.
Handle and store the engine oil with care, avoid getting dirt or dust into
the engine oil.
Before the engine oil falls below the safety margin, the low oil alert
system will automatically shut off the engine. The low oil light will turn on.
To avoid the inconvenience of unexpected engine shutoff, check the
engine oil level as often as possible.
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3.2 CHECK THE FUEL LEVEL
WARNING!
Gasoline is highly flammable and explosive under certain conditions. Refuel
in a well-ventilated area with the engine stopped. Do not smoke or allow open
flames or sparks in the area where the unit is being refueled or where gasoline
is stored. Do not overfill the tank. Be careful not to spill fuel when refueling.
Wipe up any spilled gasoline and let the area dry before starting the engine.
Gasoline substitutes such as gasohol are not recommended. They may be
harmful to the fuel system components.
1. Unscrew the fuel cap and check the fuel level in the tank.
2. Rell the fuel tank if the level is too low.
NOTE
Use of gasoline with an ethanol content greater than 10% can damage
the engine and the fuel system and will void the manufacturer’s warranty.
Only use unleaded gasoline (Pump Octane 91 or higher).
Never use stale or contaminated gasoline, or an oil/gasoline mixture.
Avoid getting dirt or water into the fuel tank.
Do not use a mixture of gasoline containing methanol. This will cause
serious damage to the engine.

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HWP & HWT SERIES

3.3 PREP THE AIR FILTER
Clean and oil the air lter before your rst use. Check the maintenance schedule for a
complete cleaning guide. Clean the air lter every 3 months or after 50 hours of
operation.
1. Loosen the knob and remove the air lter cover.
2. Remove the air lter element and inspect for cleanliness.
3. Clean the air lter with soap and water or solvent. Squeeze dry and then
soak in clean engine oil.
4. Squeeze out all excess oil and reinstall. Replace the lter if it is damaged.
NOTE
Running the engine without the air lter will quickly degrade the engine.
Wing nut
Air Cleaner Cover
Air Filter
18 HWP & HWT SERIES

3.4 HOSE CONNECTIONS
1. Insert adapters into each end of the suction and discharge hoses.
2. Attach O-Rings to the adapters.
3. Tighten the hose clamp around the discharge hose.
4. Insert strainer into the suction hose and tighten the hose clamp around the
hose.
5. Insert adapters into the appropriate pump ttings.
Rubber Seal
Hose Coupler Hose Clamp
Suction Hose
(not included)
Hose Clamp
Strainer
Hose Coupler Ring
Suction Hose
(not included)
Discharge Hose
(not included)
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HWP & HWT SERIES