Predator 70491 Assembly instructions

NATURAL GAS
HOSE KIT
DANGER
Do not use
in trailers,
truck beds,
or tents.
Use at least 20 feet away from people,
animals, and structures with exhaust pointed
away. Generator will still produce carbon
monoxide, even when burning LPG or NG.
20′
20′
20′
20′
20′
70491
FOR YOUR SAFETY
IF YOU SMELL GAS:
1. Don’t touch electrical switches.
2. Extinguish any open flame.
3. Immediately call your gas supplier.
WARNING: Improper installation,
adjustment, alteration, service, or
maintenance can cause injury or property
damage. Refer to this manual. For
assistance or additional information consult
a qualified service technician, service
agency, manufacturer, or the gas supplier.
FOR YOUR SAFETY
Do not store gasoline or other
flammable vapors and liquids in the
vicinity of this or any other generator.
Visit our website at:
http://www.harborfreight.com
Email our technical support at:
[email protected]
Email our engine support at:
[email protected]
Using a generator indoors CAN
KILL YOU IN MINUTES.
Generator exhaust contains carbon monoxide.
This is a poison you cannot see or smell.
NEVER use inside
a home or garage,
EVEN IF doors and
windows are open.
Only use OUTSIDE
and far away from
windows, doors,
and vents.
Owner’s Manual & Safety Instructions
Save This Manual Keep this manual for the safety warnings and precautions, assembly,
operating, inspection, maintenance and cleaning procedures. Write the product’s serial number in the
back of the manual near the assembly diagram (or month and year of purchase if product has no number).
Keep this manual and the receipt in a safe and dry place for future reference. 23h
When unpacking, make sure that the product is intact
and undamaged. If any parts are missing or broken,
please call 1-888-866-5797 as soon as possible.
Copyright©2023 by Harbor Freight Tools®. All rights reserved.
No portion of this manual or any artwork contained herein may be reproduced in
any shape or form without the express written consent of Harbor Freight Tools.
Diagrams within this manual may not be drawn proportionally. Due to continuing
improvements, actual product may differ slightly from the product described herein.
Tools required for assembly and service may not be included.
Read this material before using this product.
Failure to do so can result in serious injury.
SAVE THIS MANUAL.

Page 2 For technical questions, please call 1-888-866-5797. 70491
IF YOU SMELL GAS
1. NO FLAMES OR SPARKS! Immediately put out all smoking
materials and other open flames. Do not operate lights,
appliances, telephones, or cell phones. Flames or sparks
from these sources can trigger an explosion or a fire.
2. LEAVE THE AREA IMMEDIATELY! Get everyone
out of the area where you suspect gas is leaking.
3. SHUT OFF THE GAS. Turn off the main gas supply
valve on your propane tank if it is safe to do so. To
close the valve, turn it to the right (clockwise).
4. REPORT THE LEAK. From a neighbor’s home or other
nearby building away from the gas leak, call your local
gas company right away. If you can’t reach your gas
company, call 911 or your local fire department.
5. GET YOUR SYSTEM CHECKED. Before you
attempt to use your generator, the gas company
or a qualified service technician must check your
entire system to ensure that it is leak-free.
CAN YOU SMELL IT?
Natural Gas itself is odorless and tasteless, but a chemical is
added to give it an odor in order to help detect leaks quickly.
Natural Gas is lighter than air and will collect in higher areas.
Since there is a possibility of odor loss or problems
with your sense of smell, you should respond
immediately to even a faint odor of gas.
NATURAL GAS DETECTORS
Under some circumstances, you may not smell a natural
gas leak. Natural gas detectors sound an alarm if
they sense natural gas in the air. They can provide an
additional measure of security. You should consider the
purchase of one or more detectors for your home.
GUIDELINES regarding natural gas detectors:
• Buy only units that are listed under the latest
Underwriters Laboratories (UL) standard.
• Follow the manufacturer’s instructions
regarding installation and maintenance.
• Never ignore the smell of gas, even if no
detector is sounding an alarm.
GENERATOR MAINTENANCE
LEAVE IT TO THE EXPERTS. Only a qualified service
technician has the training to install, inspect, service,
maintain, and repair your generator. Have your generator
inspected just before the start of each heating season.
DO NOT TRY TO MODIFY OR REPAIR valves, regulators,
connectors, controls, or other generator and cylinder/tank parts.
Doing so creates the risk of a gas leak that can result
in property damage, serious injury, or death.
CO AND YOUR SAFETY
WHAT IS CARBON MONOXIDE (CO)?
You can’t taste or smell CO, but it is a very dangerous
gas. High levels of CO can come from appliances
that are not operating correctly, or from a venting
system or chimney that becomes blocked.
CO CAN BE DEADLY! High levels of CO can make you
dizzy or sick. In extreme cases, CO can cause brain damage
or death. Symptoms of CO poisoning include: headache,
dizziness, fatigue, shortness of breath, and nausea.
IF YOU SUSPECT CO IS PRESENT,
ACT IMMEDIATELY!
1. If you or a family member shows physical symptoms
of CO poisoning, get everyone out of the building
and call 911 or your local fire department.
2. If it is safe to do so, open windows to allow entry of fresh air,
and turn off any appliances you suspect may be releasing CO.
3. If no one has symptoms, but you suspect that CO is present,
call your propane retailer or a qualified service technician
to check CO levels and your propane equipment.
CO DETECTORS CAN IMPROVE SAFETY. For
an extra measure of safety, consider installing a CO
detector listed by UL on each level of your home.
TO HELP REDUCE THE RISK OF CO POISONING:
• Have a qualified service technician check your
propane appliances and venting systems annually,
preferably before the heating season.
• Install UL-listed CO detectors on every level of your home.
• Never use a gas oven or range-top
burners to provide space heating.
• Never use a barbecue grill (propane or
charcoal) indoors for cooking or heating.
• Regularly check your appliance exhaust vents for blockage.

Page 3For technical questions, please call 1-888-866-5797.70491
IMPORTANT SAFETY INFORMATION
1. Product MUST be used with an
appropriate shut-off valve.
2. Do not remove fittings from the ends of the hose.
3. Use this product only outdoors with a
portable Natural Gas generator.
4. For use only with Natural Gas fuel.
5. Do not allow hose to come into contact with sharp
objects or high temperature areas and surfaces.
6. Inspect before every use; do not use
if parts are loose or damaged.
7. This product is not a toy. Do not allow
children to play with or near this item.
8. Do not allow cleaning solutions or corrosive
chemicals of any kind to come in contact with the
hose. In the event of contact with the hose, rinse
immediately with clean water and dry thoroughly.
9. Keep hose clean and free of oil.
10. Do not insert any object other than the matching plug
into the quick-disconnect coupling. This may cause
the coupling to leak, disconnect, or otherwise fail.
11. Do not allow the hose to be kinked, pinched,
twisted, or torqued during installation.
12. Protect hose and fittings from dust
and dirt while disconnected.
13. This hose is manufactured and listed in accordance
with ANSI Z21.54/CSA 8.4 - Gas Hose Connectors
For Portable Outdoor Gas-Fired Appliances. Check
hose label for specific ANSI/CSA information.
14. CARBON MONOXIDE HAZARD
Using a generator indoors CAN KILL
YOU IN MINUTES.
Generator exhaust contains
carbon monoxide. This is a poison
you cannot see or smell.
OFF
RUN
START
LOWOIL OVERLOADOUTPUT
PARALLELOUTLETS
RESET
AC120V
RESET
DC12V
ESC
THROTTLE
OFF
RUN
START
LOWOIL OVERLOADOUTPUT
PARALLELOUTLETS
RESET
AC120V
RESET
DC12V
ESC
THROTTLE
NEVER use inside a home or garage,
EVEN IF doors and windows are open.
OFF
RUN
START
LOWOIL OVERLOADOUTPUT
PARALLELOUTLETS
RESET
AC120V
RESET
DC12V
ESC
THROTTLE
Only use OUTSIDE and far away from windows,
doors, and vents.
15. Never use a generator indoors, including in
garages, basements, crawl spaces and sheds.
Opening doors and windows or using fans will NOT
prevent carbon monoxide build up in the home.
16. When using generators, keep them outdoors
and far away from open doors, windows,
and vents to avoid toxic levels of carbon
monoxide from building up indoors.
17. Install carbon monoxide alarm(s) with
battery backup in nearby buildings according
to manufacturer’s instructions.
18. Maintain product labels and nameplates.
These carry important safety information.
If unreadable or missing, contact
Harbor Freight Tools for a replacement.

Page 4 For technical questions, please call 1-888-866-5797. 70491
Specifications
Hose Length 25 ft.
Operating Temperature 14°F - 104°F
Storage Temperature -40°F - 130°F
Working Pressure 1/2 PSI
Maximum Flow Rate 135,000 BTU/hr
Weight 6.3 lbs.
Coupling Connections SAE 1/2 Flare;
1/2 - 14 NPT
Connection Instructions
Read the ENTIRE IMPORTANT SAFETY INFORMATION section at the beginning of this document
including all text under subheadings therein before set up or use of this product.
Connection Diagram
1/2-14 NPT
(Female)
Generator Plug Natural Gas Hose
SAE 1/2″ Flare (Female)
Coupling
Natural Gas Shut-Off Valve
Piping
SAE 1/2″ Flare (Male)
Quick Connect Adapter 1/2-14 NPT (Male)
Connection Instructions
1. Make sure gas supply is turned off.
2. Connect Coupling to shut-off valve (not included),
then connect hose assembly to Coupling.
Note: Natural gas pipe sealant, joint
compound, or the proper type of PTFE tape
must be used ONLY for the connection from
the Coupling to the shut-off valve.
Coupling
Shut-off Valve
Hose
Quick Connect Adapter
Note: Thread size and type of each fitting
must match with each other.
3. Check that all threaded connections are
secure then turn on gas supply.

Page 5For technical questions, please call 1-888-866-5797.70491
4. Check all connections and joints with
ammonia-free soapy water solution or leak
detection solution. Bubbles that appear
to grow in size indicate a gas leak.
Indication of a gas leak
Hose
Shut-off Valve
5. If a leak is detected, turn off gas and tighten
fittings until bubbles do not appear at the joints.
Reapply pipe sealant, joint compund, or PTFE tape
between Coupling and shut-off valve as needed.
6. To connect the Hose to a generator, turn gas
shut-off valve off, pull back on the sleeve
of the adapter, and connect adapter to the
generator plug. Release sleeve and make
sure it snaps into the locked position.
Generator Plug
Quick Connect
Adapter
Hose
7. Turn gas supply back on and repeat Steps 4 and 5 to
check the connection between Hose and generator.
8. If a leak is detected at the Quick Connect
Adapter check that it is fully engaged. If it is
fully engaged but still leaking, turn off gas
shut-off valve and do not use the Hose.

Page 6 For technical questions, please call 1-888-866-5797. 70491
Parts List and Diagram
Part Description Qty
1 Natural Gas Hose 1
2 Coupling 1
3 Storage Strap 1
1
2
3

Page 7For technical questions, please call 1-888-866-5797.70491
PLEASE READ THE FOLLOWING CAREFULLY
THE MANUFACTURER AND/OR DISTRIBUTOR HAS PROVIDED THE PARTS LIST AND ASSEMBLY DIAGRAM
IN THIS DOCUMENT AS A REFERENCE TOOL ONLY. NEITHER THE MANUFACTURER OR DISTRIBUTOR
MAKES ANY REPRESENTATION OR WARRANTY OF ANY KIND TO THE BUYER THAT HE OR SHE IS
QUALIFIED TO MAKE ANY REPAIRS TO THE PRODUCT, OR THAT HE OR SHE IS QUALIFIED TO REPLACE
ANY PARTS OF THE PRODUCT. IN FACT, THE MANUFACTURER AND/OR DISTRIBUTOR EXPRESSLY
STATES THAT ALL REPAIRS AND PARTS REPLACEMENTS SHOULD BE UNDERTAKEN BY CERTIFIED AND
LICENSED TECHNICIANS, AND NOT BY THE BUYER. THE BUYER ASSUMES ALL RISK AND LIABILITY
ARISING OUT OF HIS OR HER REPAIRS TO THE ORIGINAL PRODUCT OR REPLACEMENT PARTS
THERETO, OR ARISING OUT OF HIS OR HER INSTALLATION OF REPLACEMENT PARTS THERETO.
Record Serial Number Here:
Note: If product has no serial number, record month and year of purchase instead.
Note: Some parts are listed and shown for illustration purposes only, and are not available
individually as replacement parts. Specify UPC 193175498786 when ordering parts.

26677 Agoura Road • Calabasas, CA 91302 • 1-888-866-5797
Limited 90 Day Warranty
Harbor Freight Tools Co. makes every effort to assure that its products meet high quality and durability standards,
and warrants to the original purchaser that this product is free from defects in materials and workmanship for the
period of 90 days from the date of purchase. This warranty does not apply to damage due directly or indirectly,
to misuse, abuse, negligence or accidents, repairs or alterations outside our facilities, criminal activity, improper
installation, normal wear and tear, or to lack of maintenance. We shall in no event be liable for death, injuries
to persons or property, or for incidental, contingent, special or consequential damages arising from the use of
our product. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the
above limitation of exclusion may not apply to you. THIS WARRANTY IS EXPRESSLY IN LIEU OF ALL OTHER
WARRANTIES, EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS.
To take advantage of this warranty, the product or part must be returned to us with transportation charges
prepaid. Proof of purchase date and an explanation of the complaint must accompany the merchandise.
If our inspection verifies the defect, we will either repair or replace the product at our election or we may
elect to refund the purchase price if we cannot readily and quickly provide you with a replacement. We will
return repaired products at our expense, but if we determine there is no defect, or that the defect resulted
from causes not within the scope of our warranty, then you must bear the cost of returning the product.
This warranty gives you specific legal rights and you may also have other rights which vary from state to state.