DUROMAX DUAL FUEL XP4500IH User manual

XP4500IH INVERTER GENERATOR
This manual provides information regarding the operation
and maintenance of these products. We have made every
effort to ensure the accuracy of the information in this
manual. We reserve the right to change this product at
any time without prior notice.
5800 Ontario Mills Pkwy
Ontario, CA 91764 USA
www.DuroMaxpower.com
Call our Customer Care Team Toll Free 8-5pm PST Mon-Fri
844-DuroMax
User Manual
REV: XP4500iH-06012021

1.
Introduction .................................................................................................................... 6
General Safety Procedures ........................................................................................... 8
Quick Start Guide (Gasoline) ....................................................................................... 14
Quick Start Guide (Propane)........................................................................................ 16
Generator Components............................................................................................... 18
Package Contents ......................................................................................................... 20
Introduction
3.
Checking the Oil ........................................................................................................... 28
Check the Gas Level ..................................................................................................... 29
Starting the Generator Using Gasoline ...................................................................... 30
Starting the Generator Using Propane....................................................................... 32
Starting the Generator Using Remote Start .............................................................. 36
Starting the Generator
2.
Connect the Battery...................................................................................................... 22
Adding Oil ...................................................................................................................... 23
Adding Gasoline ............................................................................................................ 24
Grounding the Generator ........................................................................................... 25
High Altitude Operation .............................................................................................. 25
Generator Setup
4.
AC Usage ........................................................................................................................ 40
Connecting a Load to the Generator.......................................................................... 42
Using the Generator
CONTENTS

5.
6.
7.
Maintenance Schedule.................................................................................................. 46
Maintenance Log ........................................................................................................... 47
Checking the Oil ............................................................................................................ 48
Changing the Oil............................................................................................................. 49
Cleaning the Air Filter .................................................................................................... 50
Spark Plug Maintenance ............................................................................................... 52
Storage and Transportation ......................................................................................... 54
Specications.................................................................................................................. 55
.......................................................................................................................... 60
Basic Troubleshooting .................................................................................................. 58
Maintenance and Care
Warranty
Troubleshooting
8. .................................................................................................. 64
Contact Information
CONTENTS

6
The DuroMax Way is a commitment to excellence. This vision is focused on the quality, reliabil-
ity, and durability of our products combined with outstanding customer service. We understand
that having dependable power whenever and wherever you need it provides comfort, safety, and
peace of mind. It is through this philosophy that DuroMax achieves our vision of...
THE DuroMax WAY
The DuroMax Way is more than just a brand, it is our understanding and appreciation of just how
important power can be to someone without it…
DuroMax FOR HOME
Electricity in our home not
only provides comfort but
safety as well. From keeping
the heat or A/C on to keeping
our food cold, power is
essential to our daily lives.
Inevitability when disaster
strikes and we are left without
power for a prolonged period
of time, our way of life is
put at risk. This is by far the
most critical time for reliable
portable power.
DuroMax FOR WORK
On the job site, portable
power allows you the ability
to get work done in remote
locations when traditional
power sources are usually
unavailable. Equipment like
table saws, sanders, and
work lights are a necessity
and portable power can
play a critical role in getting
a job done successfully and
eciently.
DuroMax FOR PLAY
Camping outdoors in a
remote location can get one
in touch with nature and allow
them to forget the stress of
the day to day grind. Here
portable power can provide
comfort as well as safety. With
portable power, you can keep
your cell phone charged, light
up your campsite, or even
brew a cup of coee, all while
being miles from civilization.

7
INTRODUCTION
Notice Regarding Emissions
DuroMax Power Equipment is headquartered in Ontario, California and is the industry’s leader in
Dual Fuel portable generator technology. In addition to a full assortment of portable generators
ranging from digital inverters to large 15,000-watt portable standby units, their product line
includes pressure washers, engines, pumps, and accessories.
The foundation of our company is built on quality, reliability, durability, and customer service. At
DuroMax our vision is simple, we are committed to Powering Everyone... Anywhere!
STOP
Please do not return
to the store.
DuroMax representatives are ready to help you
with any questions, concerns, or issues about your
new product. We can guide you through assembly,
start up, and how to operate your new generator.
We want you to be able to put your new generator
to use right away!
CALL US BEFORE YOU CONSIDER
RETURNING THE PRODUCT!
1-844-DUROMAX
TOLL-FREE
Engines that are certied to comply with U.S. EPA emission regulations for SORE (Small o Road
Equipment), are certied to operate on regular unleaded gasoline and may include the following
emission control systems: (EM) Engine Modications and (TWC) Three-Way Catalyst (if so equipped).

8
SAFETY ALERT SYMBOL
DANGER:This generator produces poisonous carbon monoxide gas when running. This
gas is both odorless and colorless. Even if you do not see or smell gas, carbon monoxide
may still be present. Breathing this poison can lead to headaches, dizziness, drowsiness,
and eventually death.
●Use outdoors ONLY in non-conned areas.
●Keep several feet of clearance on all sides to allow proper ventilation of the generator.
WARNING: The exhaust from this product contains chemicals known to the State of
California to cause cancer, birth defects, or other reproductive harm.
WARNING: This generator produces heat when running. Temperatures near exhaust can
exceed 150°F (65°C).
●Do not touch hot surfaces. Pay attention to warning labels on the generator denoting
hot parts of the machine.
●Allow generator to cool several minutes after use before touching engine or areas
which heat during use.
The safety alert symbol is used with one of the safety words (DANGER,
CAUTION, or WARNING) to alert you of hazards. Please pay attention to
these hazard notices both in this manual and on the generator.
GENERAL SAFETY PROCEDURES
Please familiarize yourself with the following safety symbols and words:
●DANGER: Indicates a hazard that will result in serious injury or death if instructions are not
followed.
●WARNING: Indicates a strong possibility of causing serious injury or death if instructions are not
followed.
●CAUTION: Indicates a possibility of personal injury or equipment damage if instructions are not
followed.

9
WARNING: This generator may emit highly ammable and explosive gasoline vapors,
which can cause severe burns or even death. A nearby open ame can lead to an
explosion even if not directly in contact with gasoline.
●Do not operate near an open ame.
●Do not smoke near the generator.
●Always operate on a rm, level surface.
●Always turn the generator o before refueling.
●Allow generator to cool for at least 2 minutes before removing the fuel cap. Loosen
cap slowly to relieve pressure in the tank.
●Do not overll the gas tank. Gas may expand during operation. Do not ll to the top
of the tank.
●Always check for spilled gas before operating.
●Empty the gasoline tank before storing or transporting the generator.
●Before transporting, turn the fuel valve to the o position and disconnect
the spark plug.
WARNING:This generator produces a powerful voltage, which can result in electrocution.
●ALWAYS ground the generator before using it (see the “Grounding the Generator”
portion of the “PREPARlNG THE GENERATOR FOR USE section).
●The generator should only be plugged into electrical devices, either directly or with
an extension cord. NEVER connect to a building electrical system without a qualied
electrician. Such connections must comply with local electrical laws and codes. Failure
to comply can create a back-ow of power, which may result in serious injury or death
to utility workers.
●Use a ground fault circuit interrupter (GFCI) in highly conductive areas such as metal
decking or steelwork. GFCls are available in-line with some extension cords.
●Do not use uncovered in rainy or wet conditions.
●Do not touch bare wires or receptacles (outlets).
●Do not allow children or non-qualied persons to operate.

Serial Number
Serial number format
STAPLE RECEIPT HERE
The serial number will be shown in two parts. The engine
model, followed by the serial number.
Engine Model: _____________________________________________
Serial Number: _____________________________________________
A purchase receipt may be necessary for warranty parts or
service in the future. If you have a paper receipt staple it
here for easy reference.
If you purchased the unit online, save the email receipt
where you can access it, and record your details here for
convenience in the future.
Purchase Date: ____________________________________________
Order Number: ____________________________________________
Retailer Name: _____________________________________________
Serial Number
The serial number is located on the engine block, above and
to the left of the oil ll.
UNIT AND PURCHASE INFORMATION
10

As the only safe way to use a portable generator, taking your
generator outside is absolutely mandatory to keep your family
safe from carbon monoxide. But there’s even more you can do.
By educating yourself about all carbon monoxide risks, you’ll
be better prepared to protect your family from this colorless,
odorless threat. Visit takeyourgeneratoroutside.com for more
information.

CARBON MONOXIDE SAFETY
Carbon Monoxide
CO Alert
●The indicator will light red.
●The engine will shutdown.
●The engine will not restart for 5 minutes.
Maintenance Required
If an error in the CO Alert system is detected the indicator
will light yellow. Please contact DuroMax Service at
844-DUROMAX for assistance.
Description
The DuroMax CO Alert system was created to protect
our customers and their families from dangerous carbon
monoxide. Just like the detector for your home the CO Alert
tests the air for to keep you safe and healthy.
CO Detected
If dangerous carbon monoxide levels are detected:
Generators are very convenient, but they can also be very dangerous. All
fuel-burning appliances and equipment release a poisonous gas called
carbon monoxide.
Carbon monoxide (also known as CO) can be dangerous for humans
and pets, even in small amounts, because it blocks oxygen from getting
into your body. Carbon monoxide poisoning can lead to death in a very
short time. It is odorless, tasteless and invisible, so you may be exposed
without knowing it. That is why carbon monoxide is sometimes called
“the silent killer.”
12

QUICK START
The Quick Start of your generator is the minimum necessary setup that will get you going as soon
as possible.

14
QUICK START GUIDE (GASOLINE)
Add gasoline
The fuel cap is located on top of the fuel tank. Fill the tank
with fresh unleaded gasoline 87 octane or higher. The tank
is full when you see fuel in the bottom of the fuel lter cup.
DO NOT overll the tank.
3.
Add oil
The oil ll cap is located on the lower engine block to the
right of the recoil start housing. Remove the oil ll cap and
ll with 10w30 oil.
2.
5. Turn breaker o
The breaker is located on the left side of the front power
panel. Flip the breaker down to prevent accidental load
when starting the generator.
4.
1.
Select Gasoline Fuel
The fuel selector is located on the right side of the
generator. Flip the switch up to select gasoline as a fuel
source.
Turn gas valve on
The gas valve is located the right hand side of the
generator.. Rotate the valve counterclockwise to the Fuel
ON (RUN) position to turn on the gasoline supply.
Add gasoline
The fuel cap is located on top of the fuel tank. Fill the tank
with fresh unleaded gasoline 87 octane or higher. The tank
is full when you see fuel in the bottom of the fuel lter cup.
DO NOT overll the tank.
3.
Add oil
The oil ll cap is located on the lower engine block to the
right of the recoil start housing. Remove the oil ll cap and
ll with 10w30 oil.
2.
5. Turn breaker o
The breaker is located on the top center of the front power
panel. Flip the breaker down to prevent accidental load
when starting the generator.
4.
1.
Select gasoline fuel
The fuel selector is located on the right side of the
generator. Flip the switch up to select gasoline as a fuel
source.
Turn gas valve on
The gas valve is located the right hand side of the
generator.. Rotate the valve counterclockwise to the fuel
on (run) position to turn on the gasoline supply.

15
Press the start button
The start button is located on the left side of the power
panel. Press the button down for 1 - 3 seconds to start the
generator.
8.
Connect devices
Connect your devices to the receptacles on the front panel.
Start with the largest loads rst.
10.
Turn start switch on
The start switch is located on the left side of the front
power panel next to the Low Idle. Press the switch up to
the start position to allow the generator to start.
7.
Turn breaker on
The breaker is located on the right side of the front power
panel. Flip the breaker up to allow the power to ow to the
receptacles.
9.
6. Turn Low Idle o
The Low Idle is located on the left side of the front power
panel, next to the breaker. Flip the switch down to disable
Low idle when starting the generator.
Press the start button
The start button is located on the left side of the power
panel. Press the button down for 1 - 3 seconds to start the
generator.
8.
Connect devices
Connect your devices to the receptacles on the front panel.
Start with the largest loads rst.
10.
Turn start switch on
The start switch is located on the left side of the front
power panel next to the Low Idle. Press the switch up to
the start position to allow the generator to start.
7.
Turn breaker on
The breaker is located in the top center of the front power
panel. Flip the breaker up to allow the power to ow to the
receptacles.
9.
6. Turn low idle o
The low idle is located on the left side of the front power
panel, next to the breaker. Flip the switch down to disable
low idle when starting the generator.

Add gasoline
The fuel cap is located on top of the fuel tank. Fill the tank
with fresh unleaded gasoline 87 octane or higher. The tank
is full when you see fuel in the bottom of the fuel lter cup.
DO NOT overll the tank.
3.
Add oil
The oil ll cap is located on the lower engine block to the
right of the recoil start housing. Remove the oil ll cap and
ll with 10w30 oil.
2.
5. Turn breaker o
The breaker is located on the left side of the front power
panel. Flip the breaker down to prevent accidental load
when starting the generator.
4.
1.
Select Gasoline Fuel
The fuel selector is located on the right side of the
generator. Flip the switch up to select gasoline as a fuel
source.
Turn gas valve on
The gas valve is located the right hand side of the
generator.. Rotate the valve counterclockwise to the Fuel
ON (RUN) position to turn on the gasoline supply.
Connect propane hose
The LPG inlet is located on the right hand side of the
generator. Connect the propane hose to both the inlet
and the propane tank. Open the propane tank.
3.
Add oil
The oil ll cap is located on the lower engine block to the
right of the recoil start housing. Remove the oil ll cap and
ll with 10w30 oil.
2.
5. Turn breaker o
The breaker is located in the top center of the front power
panel. Flip the breaker down to prevent accidental load
when starting the generator.
4.
1.
Select LPG fuel
Thefuelselectorislocatedontherightsideofthe generator.
Flip the switch down to select LPG as a fuel source.
Turn gas valve o
The gas valve is located the right hand side of the generator..
Rotate the valve clockwise to the fuel o (store) position to
turn o the gasoline supply.
QUICK START GUIDE (PROPANE)
16

Press the start button
The start button is located on the left side of the power
panel. Press the button down for 1 - 3 seconds to start the
generator.
8.
Connect devices
Connect your devices to the receptacles on the front panel.
Start with the largest loads rst.
10.
Turn start switch on
The start switch is located on the left side of the front
power panel next to the Low Idle. Press the switch up to
the start position to allow the generator to start.
7.
Turn breaker on
The breaker is located on the right side of the front power
panel. Flip the breaker up to allow the power to ow to the
receptacles.
9.
6. Turn Low Idle o
The Low Idle is located on the left side of the front power
panel, next to the breaker. Flip the switch down to disable
Low idle when starting the generator.
Press the start button
The start button is located on the left side of the power
panel. Press the button down for 1 - 3 seconds to start the
generator.
8.
Connect devices
Connect your devices to the receptacles on the front panel.
Start with the largest loads rst.
10.
Turn start switch on
The start switch is located on the left side of the front
power panel next to the low idle. Press the switch up to
the start position to allow the generator to start.
7.
Turn breaker on
The breaker is located in the top center of the front power
panel. Flip the breaker up to allow the power to ow to the
receptacles.
9.
6. Turn low idle o
The low idle is located on the left side of the front power
panel, next to the breaker. Flip the switch down to disable
low idle when starting the generator.
17

GENERATOR COMPONENTS
18
2. Recoil Handle
6. Wheels
5. Fuel Panel
1. Oil Compartment - Allows access to ll or drain the oil from the crankcase.
2. Recoil Handle - Allows you to pull start the generator.
3. Handle - Allow for easy steering during transportation.
4. Fuel Tank and Cap - Access to add fuel to the gasoline tank.
5. Fuel Panel - Contains the gasoline fuel valve, fuel switch, and propane inlet.
6. Wheels - Solid wheels allow for easy transportation over any terrain.
7. Multimeter - Provides information of Gasoline Level, Hours Run, Voltage, Hertz, and current
load on the generator measured in kW.
8. Circuit Breaker - Resettable switch that protects the generator from electrical overload
9. Battery Tender – Easily keep your battery charged when the generator is in storage by using
the included 12v battery charger.
10. 120v GFCI Receptacle - Use to connect electrical devices that run 120 Volt, 60 Hz, single phase
AC current (NEMA 5-20).
11. 120v 30A RV Receptacle - Use to connect your 120v 30A RV (TT30R).
3. Handle
1. Oil Compartment
4. Fuel Tank

7. Multimeter
12. Parallel Ports – Allow you to combine the output of two generators for maximum power.
13. USB Outlets – 5v DC Output in USB-A and USB-C for charging batteries or running USB.
14. Low Idle - Lowers the engine speed to match the load to save on fuel and reduce noise levels.
15. Start Button - Starts and shuts down the generator.
16. Start Up Switch - Allows power to the starter and panel. Prevents accidental starting.
17. CO Alert - Shuts down the engine in the event of CO buildup.
19
14. Low Idle 12. Parallel Ports
13. USB Outlets
9. Battery Tender
8. Circuit Breaker 10. 120v GFCI
11. 120v 30A RV Receptacle
15. Start Button
16. Start
Up Switch 17. CO Sensor

PACKAGE CONTENTS
Your generator comes with the items listed below. Please check to see that all of the following
items are included with your generator.
●Note: Actual tools may dier in appearance or design from image shown.
Double Sided
Screw Driver
Oil Funnel w/ hose
Spanner Spark Plug Wrench
Plug Ends
Phillips and slot blade
screwdriver used for generator
maintenance.
Used to add oil to the
generator without messy spills.
Assorted wrenches used in
generator maintenance and
assembly. Commonly 8mm,
12mm
Used in spark plug
maintenance, inspection, and
installation.
Plug heads for the receptacles
found on the generator are
included to make or rewire
your own cords.
20
Battery Tender
Used to charge the battery
when in storage