DUROMAX XP WP Series User manual

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 8-5 pm PST Mon-Fri
844-DUROMAX
REV: XPxxxWP_rev06082022
DUROMAX WATER PUMPS
USER MANUAL

CONTENTS
1. Introduction..................................................................................................................... 6
General Safety Procedures............................................................................................ 8
Unit and Purchase Information................................................................................... 12
Package Contents ......................................................................................................... 13
Water Pump Components ........................................................................................... 14
Introduction
Check the Oil ................................................................................................................ 22
Check the Gas Level ..................................................................................................... 23
Choose the Right Suction and Discharge Hose......................................................... 24
Prime the Water Pump................................................................................................. 25
Starting the Water Pump ............................................................................................. 26
Starting the Water Pump
3.
Adding Oil ...................................................................................................................... 18
Adding Gasoline ............................................................................................................ 19
Water Pump Setup
4. Maintenance Schedule................................................................................................. 30
Break-In Period ............................................................................................................. 31
Maintenance Log........................................................................................................... 31
Checking the Oil ............................................................................................................ 32
Changing the Oil............................................................................................................ 33
Changing the Air Filter.................................................................................................. 34
Spark Plug Maintenance .............................................................................................. 36
Emptying the Gas Tank ................................................................................................ 38
Storing the Water Pump for Same Day Use .............................................................. 40
Storing the Water Pump for Use Within 30 Days...................................................... 41
Storing the Water Pump for Longer Than 30 Days................................................... 42
Specications................................................................................................................. 44
Maintenance and Care
2.
5. Basic Troubleshooting .................................................................................................. 47
Troubleshooting

CONTENTS
6. .......................................................................................................................... 50
Warranty
7. .................................................................................................. 54
Contact Information
For more information and resources on this model scan the QR
code below to link to our website product information page.

6
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 necessities
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 cellphone charged, light
up your campsite, or even
brew a cup of coee, all while
being miles from civilization..
The DuroMax Way is a commitment to excellence. This vision is focused on the quality, reliability,
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...

7
DuroMax Power Equipment is headquartered in Ontario, California and is the industry’s leader in
dual fuel portable water pump technology. In addition to a full assortment of generators ranging
from digital inverters to large 15,000-watt portable standby units, our 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).
INTRODUCTION
Notice Regarding Emissions

8
DANGER:This water pump 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 water
pump.
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 water pump 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 water pump
denoting hot parts of the machine.
●Allow water pump to cool several minutes after use before touching engine or areas
which heat during use.
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.
SAFETY ALERT SYMBOL
The safety alert symbol is used with one of the safety words (DANGER,
WARNING, or CAUTION) to alert you of hazards. Please pay attention to
these hazard notices both in this manual and on the engine.

WARNING: This water pump 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 water pump.
●Always operate on a rm, level surface.
●Always turn the water pump o before refueling.
●Allow water pump 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 water pump.
●Before transporting, turn the fuel valve to the o position and disconnect
the spark plug.
9

In addition to the above safety notices, please familiarize
yourself with the safety and hazard markings on the
water pump.
GENERAL SAFETY PROCEDURES (CONTINUED)
10

DANGER HOT EXHAUST
KEEP SAFE DISTANCE
DON’T TOUCH
BURN RISK CARBON MONOXIDE SAFE DISTANCE
DANGER HOT EXHAUST
KEEP SAFE DISTANCE
DON’T TOUCH
BURN RISK CARBON MONOXIDE SAFE DISTANCE
DON’T TOUCH
CAUTION HIGH TEMPERATURE
11

Serial Number
Serial number
The serial number is located on the engine block, above and
to the left of the oil ll.
UNIT AND PURCHASE INFORMATION
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: _____________________________________________
12

PACKAGE CONTENTS
Your water pump comes with the items listed below. Please check to see that all of the following
items are included with your water pump.
●Note: Actual tools may dier in appearance or design from the image shown.
Oil Funnel w/ Hose Spanner Spark Plug Wrench
Used to add oil to the water
pump without messy spills.
Assorted wrenches used in
water pump maintenance
and assembly. 10mm/12mm,
13mm/15mm, and
17mm/19mm.
Used in spark plug
maintenance, inspection, and
installation.
Hose Connectors & Clamps
Used to secure the intake and
discharge hose to the water
pump.
Strainer
Used to help catch solid debris
prior to entering the water
pump.
13

WATER PUMP COMPONENTS
1. Air Cleaner
4. Recoil Start
3. Fuel Valve
1. Air Cleaner - A removable, cleanable, oiled, element that cleans the air going into the engine.
2. Choke - An ON/OFF choke lever that controls the fuel air mixture.
3. Fuel Valve - An ON/OFF valve that allows gasoline to the fuel switch.
4. Recoil Start - Easy pull recoil start to start the engine.
5. Throttle Lever - A throttle lever that controls the engine speed.
6. Recoil Handle – Easy pull recoil handle used to engage the recoil start and start the engine.
14
6. Recoil Handle
2. Choke
5. Throttle Lever

9. Fuel Tank
15
7. Engine Switch – An easy to use switch used to turn the water pump ON or OFF.
8. Oil Fill and Dipstick - Use to add or check the oil.
9. Fuel Tank - All metal gasoline fuel tank.
10. Discharge Port -A discharge port used for attaching the discharge hose.
11. Inlet Port – An inlet port used for attaching the suction hose.
12. Muer - A noise dampening component that helps lower the engine decibel level.
7. Engine Switch
10. Discharge Port
11. Inlet Port
8. Oil Fill and Dipstick
12. Muer

16

WATER PUMP SETUP
Proper setup of your water pump will get you going as soon as possible while making sure you and
your equipment are safe and cared for.
17

Step 1 - Adding Oil
18
WATER PUMP SETUP
The water pump requires engine oil to operate properly. The water pump, when new from the
package, contains no oil in the crankcase*. You must add the proper amount of oil before operating
the water pump for the rst time. This amount is equal to the oil capacity of the engine crankcase:
a. Make sure the water pump is on a level surface.
b. Unscrew the oil ller/dipstick cap from the engine.
c. Using a funnel, add the appropriate amount of oil
into the crankcase. You will know the crankcase is
full when the oil level has reached the lower lip of
the opening you have just poured the oil into.
d. Replace the oil ller cap.
Engine oil recommended: SAE 10W-30.
Viscosity varies with regions and temperatures. Choose your
oil viscosity using the chart to the left.
* A small amount of oil from factory testing may be present on
arrival.
* Synthetic oil may be used after the 8 hour initial break-in
period. Using synthetic oil does not increase the recommended
oil change interval. Full synthetic 5W-30 oil will aid in starting in
cold temperatures <5ºC (41ºF).
Model Number XP652WP XP650WP XP904WP
Engine Oil Capacity 20 . oz. (0.6 L) 20 . oz. (0.6 L) 37.2 . oz. (1.1 L)
WARNING: DO NOT overll the crankcase. This
may damage the motor and shorten the overall
life of your water pump.
Add oil
WARNING:Do not apply engine oils with additives or 2-stroke gasoline engine oils;
they don’t have enough lubrication and may shorten the engine’s service life.

19
Step 2 - Adding Gasoline
Add gasoline
a. Make sure the water pump is on a level surface.
b. Unscrew gas cap and set aside (NOTE: the gas cap
may be tight and hard to unscrew).
c. Slowly add unleaded gasoline to the fuel tank. Be
careful not to overll. The fuel gauge on the top of
the gas tank indicates how much gasoline is in the
water pump gas tank.
d. Replace fuel cap and wipe up any spilled gasoline
with a dry cloth.
Model Number XP652WP XP650WP XP904WP
Fuel Capacity 1 US gal 1 US gal 1.7 US gal
DANGER
DO NOT OVERFILL
THE GAS TANK
OVERFILLING CAN RESULT
IN A FIRE, EXPLOSION,
OR DEATH.
1.5”
IMPORTANT:
●To ensure that the engine runs smoothly use only FRESH, UNLEADED GAS WITH AN
OCTANE RATING OF 87 OR HIGHER.
●Never use an oil/gasoline mixture. Never use old gas.
●Avoid getting dirt or water in the fuel tank.
●Gas can age in the tank and make it hard to start up the water pump in the future.
●Never store water pump for extended periods of time with fuel in the tank.
WARNING: Gas can expand. Do not ll the gas tank to the very top. Leave a
minimum of 1.5 in open space. Gasoline and gas fumes are highly ammable.
Do not ll the tank near an open ame. Always check for fuel spills.

20