DUROMAX DuroStar DS4850EH User manual

DS4850EH 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
*Gasoline & Propane Tank Not Included
REV: DS4850EH-03062018

1.
Introduction .................................................................................................................... 6
General Safety Procedures ........................................................................................... 7
Quick Start Guide (Gasoline) ....................................................................................... 10
Quick Start Guide (Propane)........................................................................................ 12
Generator Components............................................................................................... 14
Package Contents ......................................................................................................... 16
Introduction
3.
Checking the Oil ........................................................................................................... 24
Check the Gas Level ..................................................................................................... 25
Starting the Generator Using Gasoline ...................................................................... 26
Starting the Generator Using Propane....................................................................... 28
Starting the Generator
2.
Shipping Braces ............................................................................................................ 18
Wheel Kit Installation.................................................................................................... 19
Adding Oil ...................................................................................................................... 20
Adding Gasoline ............................................................................................................ 21
Grounding the Generator ........................................................................................... 22
High Altitude Operation .............................................................................................. 22
Generator Setup
4.
AC Usage ........................................................................................................................ 32
Connecting a Load to the Generator.......................................................................... 34
Voltage Selector Switch ................................................................................................ 35
DC Usage........................................................................................................................ 36
Using the Generator
CONTENTS
3

CONTENTS
4
5.
6.
7.
Maintenance Schedule.................................................................................................. 40
Maintenance Log ........................................................................................................... 41
Checking the Oil ............................................................................................................ 42
Changing the Oil............................................................................................................. 43
Cleaning the Air Filter .................................................................................................... 44
Spark Plug Maintenance ............................................................................................... 46
Emptying the Gas Tank ................................................................................................. 48
Cleaning the Fuel Filter Cup.......................................................................................... 50
Storage and Transportation ......................................................................................... 51
Specications.................................................................................................................. 52
.......................................................................................................................... 62
Basic Troubleshooting .................................................................................................. 54
Changing / Inspecting the Carbon Brushes ............................................................... 55
Changing / Inspecting the AVR .................................................................................... 57
Maintenance and Care
Warranty
Troubleshooting
8. .................................................................................................. 66
Contact Information

INTRODUCTION
Notice Regarding Emissions
DuroStar has cemented its reputation as one of the markets leading power equipment companies
who are headquartered in the US. All of our products are manufactured to the strictest guidelines
and go through countless testing in all phases of production.
Evolving our strong engine line, DuroStar has complemented its oerings to include Pressure
Washers, Water Pumps, Engines and now oering V-Twin engines. Reliability is the highest
standard we hold ourselves to, whether its powering a heater during a winter storm that knocks
out power, dewatering a ooded property, or washing away a deck for the summer season
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).
6
STOP
Please do not return
to store.
Durostar 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

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
7
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.

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 gas.
●Do not operate near an open ame.
●Do not smoke near generator.
●Always operate on a rm, level surface.
●Always turn generator o before refueling.
●Allow generator to cool for at least 2 minutes before removing fuel cap. Loosen cap
slowly to relieve pressure in tank.
●Do not overll 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 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).
●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 steel work. 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.
GENERAL SAFETY PROCEDURES
8

In addition to the above safety notices, please familiarize yourself with the safety and
hazard markings on the generator.
GENERAL SAFETY PROCEDURES
9
HIGH VOLTAGE ELECTRICAL
THIS GENERATOR IS NOT INTENDED
TO POWER SENSITIVE ELECTRONIC
EQUIPMENT WITHOUT THE ADDITION
OF AN APPROPRIATE LINE CONDITIONER
(SOLD SEPARATELY)
5. Remove any flammable materials next to or from this equipment.
7. Keep access doors on enclosures closed and locked when access
is not required.
8. Read and adhere to all electrical warnings and precautions
discussed in the instruction manuals before setting up and running
the generator.
6. Do not smoke, allow sparks, allow flames, or other
sources of ignition around the engine, fuel tank, or battery. Fuel
vapors are explosive. While charging, batteries emit hydrogen gas
which is highly explosive. Do not refill the generator fuel tank while
the engine is running.
10. All maintenance must be performed by a qualified mechanic or
licensed electrician.
DO NOT REMOVE THIS WARNING LABEL
Made in China
9. Do not attempt to start the generator engine before
it has been checked for sufficient and recommended fuel and oil.
Generator battery should be fully charged.
1. All personnel must wear ANSI approved safety goggles when
setting up this generator, working with tools and equipment.
2. Before using this generator, you must read the Engine Operation,
Maintenance, Parts and Gasoline Generator Instructions
manual. Read and adhere to all safety warnings to reduce the risk
of personal injury and damage to equipment.
3. All electrical work, including earth-ground connections, should be
completed by a licensed electrician.
4. Generator fuel and fumes are flammable and
potentially explosive. Use proper fuel storage and handling
procedures while using this generator.
RISK OF ELECTRIC SHOCK READ OWNER’S MANUAL
BEFORE OPERATING THIS
GENERATOR.
CHECK ENGINE OIL LEVEL
BEFORE EACH START
CAPACITY: .6L / 20oz. (US)
-Always ground properly before use.
-Never use in rainy or wet conditions.
-Never touch bare wires or outlets.
-Do not connect to any building
electrical system.
CHECK FOR FUEL LEAKS
OR SPILLS BEFORE
OPERATING. NEVER FUEL
WHILE GENERATOR IS
RUNNING.
DANGER
CAUTION
DANGER
DANGER
DANGER
DANGER
DANGER
DANGER

QUICK START GUIDE (GASOLINE)
Remove shipping braces
The shipping braces prevent engine movement during
shipment. Flip the generator over and remove the brightly
colored brace between the motor and the frame, and the
wood brace under the generator.
1.
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.
Turn gas valve on
The gas valve is located above the recoil start on the
bottom of the fuel tank. Rotate the valve clockwise to the
vertical position to turn on the gas supply.
5.
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.
Turn breaker o
The breaker is located on the right side of the front power
panel. Flip the breaker down to prevent accidental load
when starting the generator.
4.
10