GENTRON PRO2 Series User manual

Pro2 7500WATT GENERATOR
Owner’s Manual
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7500W Generator
Topic Page
Limited Warranty 3
Safety Guidelines 5
General Precautions 6
Battery 15
Assembly 16
Operation 19
Inspection, Cleaning and Maintenance 25
Installation 26
Compliance 28
Specifications 29
General Parts Listing 30
WARNING! READ AND UNDERSTAND ALL SAFETY PRECAUTIONS
IN THIS MANUAL BEFORE OPERATING. FAILURE TO COMPLY WITH
INSTRUCTIONS IN THIS MANUAL COULD RESULT IN PERSONAL
INJURY, PROPERTY DAMAGE, AND/ OR VOIDING OF YOUR
WARRANTY. GENTRON® WILL NOT BE LIABLE FOR ANY DAMAGE
BECAUSE OF FAILURE TO FOLLOW THESE INSTRUCTIONS.
2

3
Owner’s Manual
Limited Warranty
Gentron® warrants to the original purchaser who uses the product in a consumer
application (personal, residential or household usage) that all products covered under this
warranty are free from defects in material and workmanship for one year from the date of
purchase. All products covered by this limited warranty which are used in commercial applications
(i.e. income producing) are warranted to be free of defects in material and workmanship for
90 days from the date of original purchase. Products covered under this warranty include air
compressors, air tools, service parts, pressure washers and generators.
Gentron® will repair or replace, at Gentron® sole option, products or components which have
failed within the warranty period. Service will be scheduled according to the normal work flow
and business hours at the service center location, and the availability of replacement parts. All
decisions of Gentron® with regard to this limited warranty shall be final.
This warranty gives you specific legal rights, and you may also have other rights which vary from
state to state.
RESPONSIBILITY OF ORIGINAL PURCHASER (initial User):
To process a warranty claim on this product, DO NOT return item to the retailer. The product must
be evaluated by an Authorized Warranty Service Center. For the location of the nearest Authorized
Warranty Service Center contact the retailer or place of purchase.
Retain original cash register sales receipt as proof of purchase for warranty to work.
Use reasonable care in the operation and maintenance of the product as described in the Owner’s
Manual(s).
Deliver or ship the product to the Authorized Warranty Service Center. Freight costs, if any must
be paid by the purchaser.
If the purchaser does not receive satisfactory results form the Authorized Warranty Service Center,
the purchaser should contact Gentron®.

4
7500W Generator
Limited Warranty (cont’d)
THIS WARRANTY DOES NOT COVER:
• Merchandise sold as reconditioned, used as rental equipment, or floor or display models.
• Merchandise that has become damaged or inoperative because of ordinary wear, misuse,
cold, heat, rain, excessive humidity, freeze damage, use of improper chemicals, negligence,
accident, failure to operate the product in accordance with the instructions provided in the
Owner’s Manual(s) supplied with the product, improper maintenance, the use of accessories or
attachments not recommended by Gentron®, or unauthorized repair or alterations.
• Repair and transportation costs of merchandise determine not to be defective.
• Costs associated with assembly, required oil, adjustments or other installation and start-up
costs.
• Expendable parts or accessories supplied with the product which are expected to become
inoperative or unusable after a reasonable period of use.
• Merchandise sold by Gentron® which has been manufactured by and identified as the
product of another company, such as gasoline engines. The product manufacturer’s warranty, if
any, will apply.
• ANY INCIDENTAL, INDIRECT OR CONSEQUENTIAL LOSS, DAMAGE, OR EXPENSE THAT
MAY RESULT FROM ANY DEFECTS, FAILURE OR MALFUNCTION OF THE PRODUCT IS
NOT COVERED BY THIS WARRANTY. Some states do not allow the exclusion, so it may not
apply to you.
• IMPLIED WARRANTIES, INCLUDING THOSE OF MERCHANTABILITY OR FITNESS FOR
A PARTICULAR PURPOSE, ARE LIMITED TO ONE YEAR FROM THE DATE OF ORIGINAL
PURCHASE. Some states do not allow limitations on how long an implied warranty lasts, so the
above limitations may not apply to you.

5
Owner’s Manual
Safety Guidelines - Definitions
This manual contains important information that you need to know and
understand in order to protect YOUR SAFETY and to PREVENT
EQUIPMENT PROBLEMS. The following symbols help you recognize this
information. Please read the manual and pay attention to these sections.
Save These Important Safety Instructions!
Read and understand all of these safety instructions. Be sure to retain
them for future use.
WARNING! WARNINGS INDICATE A CERTAINTY OR STRONG
POSSIBILITY OF PERSONAL INJURY OR DEATH IF
INSTRUCTIONS ARE NOT FOLLOWED.
CAUTION: CAUTIONS INDICATE A POSSIBILITY OF
EQUIPMENT DAMAGE IF INSTRUCTIONS ARE NOT
FOLLOWED.
NOTE: NOTES GIVE HELPFUL INFORMATION
WARNING! IMPROPER OPERATION OR MAINTENANCE
OF THIS PRODUCT COULD RESULT IN SERIOUS INJURY
AND PROPERTY DAMAGE. READ AND UNDERSTAND ALL
WARNINGS AND OPERATING INSTRUCTIONS BEFORE USING
THIS EQUIPMENT. WHEN USING AIR TOOLS, BASIC SAFETY
PRECAUTIONS SHOULD ALWAYS BE FOLLOWED TO REDUCE
THE RISK OF PERSONAL INJURY.

6
7500W Generator
Gasoline and Oil
This product requires oil and fuel. Attempting to start the engine without oil will ruin
the engine and void the warranty. Work in well ventilated area. Keep cigarettes,
flames or sparks away from the work area or where gasoline is stored.
WARNING! GASOLINE IS EXTREMELY FLAMMABLE AND IS EXPLOSIVE
UNDER CERTAIN CONDITIONS. KEEP OUT OF REACH OF CHILDREN.
• Gasoline fuel and fumes are flammable and potentially explosive. Use proper fuel storage and
handling procedures. Always have multiple ABC class fire extinguishers nearby.
• Keep the generator and surrounding area clean at all times.
• Fuel or oil spills must be cleaned up immediately. Dispose of fluids and cleaning materials as per
any local, state, or federal codes and regulations. Store oily rags in a covered metal container.
• Never store fuel or other flammable materials near the generator.
General Precautions
WARNING! FAILURE TO FOLLOW THESE INSTRUCTIONS CAN RESULT IN
SEVERE INJURY OR DEATH.
DANGER
Carbon Monoxide
Carbon Monoxide
Generator exhaust contains high levels of carbon monoxide (CO), a poisonous gas you cannot see
or smell. If you can smell the generator exhaust, you are breathing CO. But even If you cannot smell
the exhaust, you could be breathing CO.
· NEVER use a generator inside homes, garages, crawlspaces, or other partly enclosed areas. Deadly
levels of carbon monoxide can build up in these areas. Using a fan or opening windows and doors
does NOT supply enough fresh air.
· ONLY use a generator outdoors and far away from open windows, doors, and vents. These
openings can pull in generator exhaust.
Even when you use a generator correctly, CO may leak into the home. ALWAYS use a
battery-powered or battery-backup CO alarm in the home.
If you start to feel sick, dizzy, or weak after the generator has been running, move to fresh air RIGHT
AWAY. See a doctor. You could have carbon monoxide poisoning.
Using a generator indoors WILL KILL YOU IN MINUTES.

Owner’s Manual
7
General Precautions (cont’d)
Gasoline and Oil (cont’d)
• Do not smoke, or allow sparks, flames or other sources of ignition around the engine and fuel
tank. Fuel vapors are explosive.
• Keep grounded conductive objects, such as tools, away from exposed, live electrical parts and
connections to avoid sparking or arcing. These events could ignite fumes or vapors.
• Do not refill the fuel tank while the engine is running or while the engine is still hot. Do not
operate the generator with known leaks in the fuel system
• Excessive buildup of unburned fuel gases in the exhaust system can create a potentially
explosive condition. This buildup can occur after repeated failed start attempts, valve testing, or
hot engine shutdown. If this occurs, open exhaust system drain plugs, if equipped, and allow the
gases to dissipate before attempting to restart the generator.
• Use only engine manufacturer recommended fuel and oil.
Hot Components
WARNING! ENGINE AND EXHAUST SYSTEM PARTS BECOME VERY
HOT AND REMAIN HOT FOR SOME TIME AFTER THE ENGINE IS RUN. WEAR
INSULATED GLOVES OR WAIT UNTIL THE ENGINE AND EXHAUST SYSTEM
HAVE COOLED BEFORE HANDLING THESE PARTS.

8
7500W Generator
General Precautions (cont’d)
Work Area
• Keep your work area clean and well lit. Cluttered benches and dark areas invite accidents.
• Do not operate power tools in explosive atmospheres, such as in the presence of flammable
liquids, gases, or dust. Generators create sparks which may ignite the dust or fumes.
• Keep bystanders, children, and visitors away while operating a generator. Provide barriers or
shields as needed.
Electrical Safety
grounded in accordance with all codes and ordinances. Never remove the
grounding prong or modify the plug in any way. Do not use any adapter plugs.
• Grounding provides a low-resistance path to carry electricity away from the
user in the event of an electrical malfunction.
• Double insulated tools are equipped with a polarized plug where one blade is wider than the
other. This plug fits in a polarized outlet only one way. If the plug does not fit fully in the outlet,
reverse the plug. If it still does not fit, contact a qualified electrician to install a polarized outlet.
Do not change the plug in any way. Double insulation eliminates the need for the three-wire
grounded power cord and grounded power supply system.
• Avoid body contact with grounded surfaces such as pipes, radiators, ranges, and refrigerators.
There is an increased risk of electric shock if your body is grounded.
• Do not expose generator to rain or wet conditions. Water entering a generator will increase the
risk of electric shock.
• Do not abuse the power cord. Keep power cords away from heat, oil, sharp edges, or moving
parts. Replace damaged power cords immediately. Damaged power cords increase the risk of
electric shock.
• When operating a power tool outside, use an outdoor extension cord marked “W-A” or “W”.
These extension cords are rated for outdoor use, and reduce the risk of electric shock.
• Grounded tools must be plugged into an outlet properly installed and

9
Owner’s Manual
General Precautions (cont’d)
Electrical Safety (cont’d)
• All connections and conduits from the generator to the load must only be installed by trained and
licensed electricians, and in compliance with all relevant local, state, and federal electrical
codes and standards, and other regulations where applicable.
• The generator must be earth-grounded for fixed installations in accordance with all relevant
electrical codes and standards before operation.
• Do not attempt to connect or disconnect load connections while standing in water, or on wet or
soggy ground.
• Do not touch electrically energized parts of the generator and interconnecting cables or
conductors with any part of the body, or with any non-insulated conductive object.
• Connect the generator only to a load or electrical system (110/120 volt) that is compatible with
the electrical characteristics and rated capacities of the generator.
• Before servicing equipment powered by the generator, disconnect the equipment from its power
input.
• Keep all electrical equipment clean and dry. Replace any wiring where the insulation is cracked,
cut abraded or otherwise degraded. Replace terminals that are worn, discolored, or corroded.
Keep terminals clean and tight.
• Insulate all connections and disconnected wires.
• Guard against electric shock. Prevent body contact with grounded surfaces such as pipes,
radiators, ranges, and refrigerator enclosures.
Personal Safety
• Stay alert. Watch what you are doing, and use common sense when operating a generator. Do
not use generator while tired or under the influence of drugs, alcohol, or medication. A moment
of inattention while operating generators may result in serious personal injury.
• Dress properly. Do not wear loose clothing or jewelry. Contain long hair. Keep your hair, clothing,
and gloves away from moving parts. Loose clothes, jewelry, or long hair can be caught in
moving parts.

7500W Generator
General Precautions (cont’d)
Personal Safety (cont’d)
• Avoid accidental starting. Make sure the power switch is in its “OFF” position, and disconnect
the spark plug wire when not in use.
• Remove adjusting keys or wrenches before turning the generator on. A wrench or a key that is
left attached to a rotating part of the generator may result in personal injury.
• Do not overreach. Keep proper footing and balance at all times.
• Use safety equipment. Always wear eye protection. Wear ANSI approved safety impact eye
goggles. Dust mask, non-skid safety shoes, hard hat, or hearing protection must be used for
appropriate conditions.
• Do not force the generator. Use the correct generator for your application. The correct generator
will do the job better and safer at the rate for which it is designed.
• Do not use the generator if the power switch does not turn it on or off. Any generator that cannot
be controlled with the power switch is dangerous and must be replaced.
Generator Use and Care
Make sure the power switch is in its “OFF” position and disconnect the spark plug wire before
making any adjustment, changing accessories, or storing the generator. Such preventive safety
measures reduce the risk of starting the generator accidentally.
Store idle generators out of reach of children and other untrained persons. Generators are
dangerous in the hands of untrained users.
Maintain generators with care. Do not use damaged generator. Tag damaged generators “Do not
use” until repaired.
Check for misalignment or binding of moving parts, breakage of parts, and any other condition that
may affect the generator’s operation. If damaged, have the generator serviced before using. Many
accidents are caused by poorly maintained generators.
Use only accessories that are recommended by the manufacturer for your model. Accessories that
may be suitable for one generator may become hazardous when used on another generator.
10

Owner’s Manual
General Precautions (cont’d)
Servicing
Maintain labels and name plates on the generator and engine. These carry important information.
If unreadable or missing, contact Gentron® immediately for a replacement.
Generator service must be performed only qualified repair personnel. Service or maintenance
performed by unqualified personnel could result in a risk of injury.
When servicing a generator, use only identical replacement parts. Follow all appropriate
instructions in this manual. Use of unauthorized parts or failure to follow maintenance instructions
may create a risk of electric shock or injury.
Heart Pacemakers
WARNING! PEOPLE WITH PACEMAKERS SHOULD CONSULT THEIR
PHYSICIAN(S) BEFORE USING THIS PRODUCT. ELECTROMAGNETIC
FIELDS IN CLOSE PROXIMITY TO A HEART PACEMAKER COULD CAUSE
INTERFERENCE TO OR FAILURE OF THE PACEMAKER.
Installation
• Ensure installation meets all applicable safety, and local and national electrical codes. Have
installation performed by a qualified, licensed electrician and building contractor.
• All electrical work, including the earth-ground connection, should be completed by a licensed
electrician.
• Any separate fuel storage or generator supply facility must be built or installed in full compliance
with all relevant local, state, and federal regulations.
11

12
7500W Generator
General Precautions (cont’d)
Installation (cont’d)
• If the generator is installed outdoors, it must be weatherproofed and should be soundproofed. It
should not be run outdoors without protection to the generator and wiring conduit.
• The generator weighs 195 lbs. Two or more people should assist when moving or lifting this
product. Never lift the generator using the engine or alternator lifting lugs. Connect lifting
equipment to the frame of the generator
• Before lifting the generator, ensure the lift rigging and supporting structure are in good
condition, and are rated to lift such a load.
• Keep all personnel away from the suspended generator during relocating.
• The supporting floor/ground surface should be level and strong enough to safely hold the weight
of the generator. If the floor/grounded surface is not level, strong cross members should be
placed under the full length of the generator frame at its low side.
• For trailer installation, the generator should be mounted on the center point of the trailer, over
the wheels. The trailer must be capable of supporting the weight of the generator and all
contents (tools, etc.)
• Install sound-and weather-proofing only when it is not raining or snowing to avoid trapping
moisture within the generator’s area.
Mechanical
• Always make sure the power switch is in its “OFF” position. Disconnect the spark plug wire, and
allow the engine to completely cool before carrying out maintenance.
• Check for damaged parts. Before using the generator, any part that appears damaged should
be carefully checked to determine that it will operate properly and perform its intended function.
Check for alignment and binding of moving parts, any broken parts or mounting fixtures, and any
other condition that may affect proper operation technician.
• The generator is designed with guards for protection from moving parts. In any case, care must
still be taken to protect personnel and equipment from other mechanical hazards when working
around the generator.

Owner’s Manual
General Precautions (cont’d)
Mechanical (cont’d)
• Do not operate the generator with safety guards removed. While the generator is running, do not
attempt to reach around the safety guard for maintenance or any other reason.
• Keep hands, arms, long hair, loose clothing, and jewelry away from moving parts. Be aware that
when engine parts are moving fast they cannot be seen clearly.
• Keep access doors on enclosures closed and locked when access is not required.
• When working on or around the generator always wear protective clothing including ANSI
approved safety gloves, safety eye goggles, and safety hat.
• Do not alter or adjust any part of the generator that is assembled and supplied by the
manufacturer.
• Always follow and complete scheduled engine and generator maintenance.
Chemicals
• Avoid contact with hot fuel, oil, exhaust fumes, and hot solid surfaces.
• Avoid body contact with fuels, oils, and lubricants used in the generator. If swallowed, seek
medical treatment immediately. Do not induce vomiting if fuel is swallowed. For skin contact,
immediately wash with soap and water. For eye contact, immediately flush eyes with clean water
and seek medical attention.
Noise
• Prolonged exposure to noise levels above 85 DBA is hazardous to hearing. Always wear ANSI
approved ear protection when operating or working around the generator when it is running.
13

7500W Generator
General Precautions (cont’d)
Extension Cord
If an extension cord (not included) is used, make sure to use only UL approved cords having the
correct gauge and length according to the following table:
Nameplate Amps (@ Cord Lengths
full load)
0'-50' 50'-100' 100'-150' 150'-200'
0 - 5 16 16 12 12
5.1 - 8 16 14 10 -
8.1 - 12 14 12 - -
14
AWG
AWG
AWG
AWG
AWG
AWG
AWG
AWG

Owner’s Manual
15
Battery
To start generator with electric start you will need a battery (not included). You can use a 12v lawn
tractor battery with the following specifications: The dimensions are Wx7.5” Dx5” Hx7” (including
terminals). A rated cranking amperage of 200. Terminals are regular, not reversed. Note: Using a
battery not designed for this unit may void warranty. Also this generator can also be started with
the pull start.
Photos below demonstrate battery plate attachment.
1) Bolt on plate with M6X40 bolts as shown below.
2) Put the battery on the frame, have the battery assembled with the provided accessories
as shown.
Accessories
M6x40
M6 Nut Battery

7500W Generator
16
Assembly
Unpacking
1. Remove the generator and loose parts box from the carton.
2. Compare the loose parts with the inventory list below.
Loose Parts (Wheel kit and handle)
Check all loose parts against the following list. Contact your dealer toll free at 888.896.6881
if any of the loose parts shown are not included with your generator
Hardware Check:
Your Hardware Kit should include:
1) 1 Handle with bolt and bracket
2) 1 Handle Retainer Bracket with Bolt
3) 6 (six) 8mm bolts, (6mm x 1.0) thread
4) 6 (six) 10mm Nuts (6mm x 1.0) thread
5) 2 (two) rubber bushings with 2 nuts
6) 1 (one) axle shaft
7) 2 (two) washers
8) 2 (two) cotter pins
9) 4 (four) leg bolts and nuts
10) 1 (one) generator leg
11) 2 (two) wheels (not shown)
1
9
2
3
10
4
5
6
7
8

Owner’s Manual
17
Assembly
Handle Installation.
Floor Mount Instalation
Start by installing the handle on the
frame with two 8mm bolts.
Then install the handle retainer as
shown.
This generator has an option of not using the mobility kit.
If this is desired, just install the 4 rubber mounts on the
frame as shown. (this is why there are 6 mounts).
If you want to use the mobility kit, save the 4 mounts
in a safe place, and continue to the “mobility kit
installation.” section.
Here is a picture of the floor
mounts installed.

7500W Generator
18
Assembly
Wheel Kit Installation
Start by installing the
rubber floor mounts
onto the support leg
as shown.
Note: The leg should
be installed on the
same side as the pull
handle.
This is what the leg
looks like when it is
installed.
The wheels should be installed on the side
opposite to the handle.
Place a block of wood under the
generator so that you don’t have to hold it
up while trying to install the axle.
Push the two axle mount brackets onto
each side of the axel. Place the axle under
the unit.
Thread two bolts thru the tubular frame
and thru the axle mounting plates. Thread
a nut onto the bolt and tighten.
Slide the wheels
onto the axle. Place
a washer over the
wheel
Push the cotter pin thru
the axle and bend it
backwards as shown
Your generator is now
mobile. Enjoy!
Here is the hardware required to install
the support leg. Place a block of wood
under the generator so that you don’t
have to hold it up while trying to install
the leg.
Place the support leg under the frame.
Push the bolt thru the frame and thru
the leg. Thread a nut onto the bolt.
Tighten with a wrench.
1
3 4
5 6
2

19
Owner’s Manual
Operation
NOTE: THE PARTS LISTED ABOVE ARE HELPFUL FOR LOCATING THE CONTROLS
MENTIONED BELOW.
CAUTION: Prior To First Using The Generator, The Engine
Must Be Filled With A High Quality SAE 10w-30 Grade Engine
Oil. To Do So Unscrew And Remove The Engine’s Oil Dipstick
Located At The Bottom Of The Engine Crankcase. Fill The
Engine’s Crankcase Until The Oil Level Is Level With The
Upper Marked Line On The Dipstick. Then, Screw The Dipstick
Back Into The Oil Fill Hole.
Before Starting the Generator
1. Check that the engine power switch is in its “OFF” position (see diagram on next page).
2. Before the first use, remove the fuel tank cap and fill the fuel tank with unleaded gasoline. When
fueling, be sure that the fuel strainer is in place. Replace the fuel tank cap. Thereafter, check
the engine’s fuel gauge for the amount of unleaded gasoline in the fuel tank. If necessary, refill
the fuel tank with unleaded gasoline. The generator must be turned off and cooled down before
refilling the fuel tank.
ENGINE OIL RECOMMENDATIONS
Oil is a major factor affecting performance and service life. Use
4-stroke automotive detergent oil.
SAE 10W 30 is recommended for general use. Other viscosities
shown in the chart may be used when the average temperature in
your area is within the recommended range.
AMBIENT TEMPERATURE
-20
-20 0 20 40 60 80 100°F
-10 10 20 30 40°C0
5W-30
10W-30
30
SAE Viscosity Grades
Oil Fill Control Panel
Fuel Tank
Electric
Start

20
7500W Generator
Operation (cont’d)
Starting
1. Turn the engine switch to the ON position.
The engine switch enables and disables the ignition
system.
OFF: To stop the engine
RUN: To run the engine
2. The fuel valve is located between the fuel tank and
the carburetor. When the valve lever is in the ON
position, fuel is allowed to flow from the fuel tank to
the carburetor. Be sure to return the fuel valve lever to
the OFF position after stopping the engine.
3. To start a cold engine, move the choke lever to the
CLOSED position. To restart a warm engine, leave the
choke lever in the OPEN position.
The choke lever opens and closes the choke valve in
the carburetor.
The CLOSED position enriches the fuel mixture from
starting a cold engine.
The OPEN position provides the correct fuel mixture
for operation after starting, and for restarting a warm
engine.
RUN
OFF
Key Start