GTX3500 - Electric generator Gentrax - Free user manual and instructions

Type of Product	Portable Generator
Dimensions (L x W x H)	600 x 450 x 500 mm
Weight	45 kg
Power Source	Gasoline
Rated Power	3500 W
Peak Power	4000 W
Starting System	Recoil Start
Engine Type	4-Stroke, Single Cylinder
Displacement	212 cc
Fuel Tank Capacity	15 L
Run Time (50% Load)	8 hours
Outlets	2x 120V AC, 1x 12V DC
Overload Protection	Yes (Circuit Breaker)
Low Oil Shutdown	Yes
Fuel Gauge	Yes
Noise Level	68 dB(A) @ 7m
Oil Capacity	0.6 L
Spark Plug Type	F7TC
Maintenance Interval (Oil Change)	Every 50 hours
Safety Features	Automatic Voltage Regulator (AVR), Spark Arrester
Warranty	1 Year Limited

Frequently Asked Questions - GTX3500 Gentrax

How do I start the GTX3500 generator?

Ensure the generator is on a flat surface, turn the fuel valve ON, set the choke to CLOSED, move the engine switch to ON, and pull the recoil cord firmly. Once it starts, gradually open the choke.

What type of oil should I use?

Use SAE 10W-30 engine oil (API service classification SF or higher). The oil capacity is 0.6 L. Check and change oil regularly.

Can I run the generator indoors?

No. Running the generator indoors can cause carbon monoxide poisoning, which can be fatal. Always operate the generator outdoors, away from windows, doors, and vents.

How long can the GTX3500 run continuously?

At 50% load, the generator runs about 8 hours on a full tank. At rated load, run time decreases. Allow the generator to cool down after long use.

What maintenance is required?

Regular maintenance includes: change oil every 50 hours, clean or replace air filter, check spark plug, and clean fuel filter. Refer to the manual for detailed intervals.

What does the automatic voltage regulator do?

The AVR stabilizes the output voltage, protecting sensitive electronics from voltage fluctuations. It ensures a steady 120V supply.

Why does the generator shut down suddenly?

Possible causes: low oil level (triggers low oil shutdown), overload (trips circuit breaker), or fuel depletion. Check oil, reset breaker, or refuel.

Can I connect the generator to my home?

Only with a suitable transfer switch installed by a licensed electrician. Improper connection can cause backfeeding and danger to utility workers.

How to store the generator when not in use?

Drain fuel or add stabilizer, change oil, clean the unit, and store in a dry, ventilated area. Cover to protect from dust.

What is the warranty period?

The Gentrax GTX3500 comes with a 1-year limited warranty. Keep your proof of purchase and register the product online.

USER MANUAL GTX3500 Gentrax

IMPORTANT — Please make certain that persons who are to use this equipment thoroughly read and understand this user's manual prior to operation

GASOLINE INVERTER GENERATOR USER'S MANUAL

CONTENTS

● Never operate the engine in a closed area or it may cause unconsciousness and death within a short time. Operate the engine in a well ventilated area.

2) FUEL IS HIGHLY FLAMMABLE AND POISONOUS

● Always turn off the engine when refueling
● Never refuel while smoking or in the vicinity of an open flame.
● Take care not to spill any fuel on the engine or muffler when refueling.
- If you swallow any fuel, inhale fuel vapor, or allow any to get in your eyes, see your doctor immediately. If any fuel spills on your skin or clothing, immediately wash with soap and water and change your clothes.
- When operating or transporting the machine, be sure it is kept upright. If it tilts, fuel may leak from the carburetor or fuel tank.

3) ENGINE AND MUFFLER MAY BE HOT

• Place the machine in a place where pedestrians or children are not likely to touch the machine.
  ● Avoid placing any flammable materials near the exhaust outlet during operation.
• Keep the machine at least 1 m (3 ft) from buildings or other equipment, or the engine may overheat.
  ● Avoid operating the engine with a dust cover.

- Be sure to carry the generator only by its carrying handle.

- Put the machine on the flat ground, for the machine eliminating heat freely.

4) ELECTRIC SHOCK PREVENTION

● Never operate the engine in rain or snow.
● Never touch the machine with wet hands or electrical shock will occur.
- Be sure to ground (earth) the generator.

NOTE:

Use ground (earth) lead of sufficient current capacity.

Diameter: 0.12mm (0.005 in)/ampere

EX: 10 Ampere -1.2mm (0.055 in)

5) CONNECTION NOTES

• Avoid connecting the generator to commercial power outlet.
  ● Avoid connecting the generator in parallel with any other generator.

2. CONTROL FUNCTION

DESCRIPTION

(1) Fuel tank
(4) Carrying handle
(7) Choke lever
(10) Brake lever
(13) Air filter
(16) AC pilot light
(19) Economy control switch
(22) DC receptacle
(25) AC receptacle L5-30R
(28) Parallel connection socket
(2) Fuel tank cap
(5) Muffler
(8) Recoil starter
(11) Wheel
(14) Fuel pump
(17) Overload indicator light
(20) Voltmeter
(23) Ground (earth) terminal
(26) AC receptacle 5-20R
(29) Frequency Transfer Switch
(3) Fuel filter
(6) Spark plug
(9) Fuel cock
(12) Oil filler cap
(15) Engine switch
(18) Oil warning light
(21) DC protector
(24) AC receptacle
(27)Parallel connection control socke

(1) Fuel tank
(2) Fuel tank cap
(3) Fuel filter
(4) Carrying handle
(5) Muffler
(6) Spark plug
(7) Choke lever
(8) Recoil starter
(9) Fuel cock
(10) Brake lever
(11) Wheel
(12) Oil filler cap
(13) Air filter
(14) Fuel pump
(15) Battery
(16) Engine switch
(17) AC pilot light
(18) Overload indicator light
(19) Oil warning light
(20) Voltmeter
(21) Economy control switch
(22) DC protector
(23) DC receptacle
(24) Ground (earth) terminal
(25) AC receptacle
(26) AC receptacle L5-30R
(27) AC receptacle 5-20R
(28)Parallel connection control soc
(29)Parallel connection socket
(30) Frequency Transfer Switch
(31)Remote control

1) OIL WARNING SYSTEM

When the oil level falls below the lower level, the engine stops automatically. Unless you refill with oil, the engine will not start again.

2) ENGINE SWITCH

The engine switch controls the ignition system.

① "ON"(run)

Ignition circuit is switched on. The engine can be started.

② "STOP"

Ignition circuit is switched off. The engine will not run.

③ "START"

Starting circuit is switched on. The starter motor starts.

3) ECONOMY CONTROL SWITCH

When the economy control switch is turned "ON", the economy control control the engine speed according to the connected load. The res

better fuel connection and less noise.

4) DC CIRCUIT PROTECTOR

The DC circuit protector turns off automatically when the load exceeds the generator rated output.

CAUTION:

- Reduce the load to within specified generator rated output if the DC circuit protector turn off.

5) FUEL TANK CAP AIR VENTKNOB

The fuel tank cap is provided with an air vent knob to stop fuel flow. The air vent knob must be turned once clockwise from the closed position. This will allow fuel to flow to the carburetor and the engine to run.

When the engine is not in use, tighten the air vent knob counterclockwise until it is finger-tight to stop fuel flow.

6) FUEL COCK

The fuel cock is used to supply fuel from the tank to the carburetor.

7) REMOTE CONTROL SWITCH

The remote control switch controls the ignition system

① "ON"

The starter motor starts.

② "OFF"

The engine will not run.

8) BRAKE LEVER

The function of brake lever is preventing generator moving.

① Brake lever is not working, generator can move.

② Brake lever is working, generator can't move.

3. PRE-OPERATION CHECK

NOTE:

• Add the fuel more than 5 liters for the first time to use this machine.
  ● Pre-operation checks should be made each time the generator is used.

1) CHECK ENGINE FUEL

● Make sure there is sufficient fuel in the tank.
- If fuel is low, refill with unleaded automotive gasoline.
- Be sure to use the fuel filter screen on the fuel filter neck.
● Recommended fuel: Unleaded gasoline.
● Fuel tank capacity: (see page 17)

WARNING:

• Do not refill tank while engine is running or hot.
• Close fuel cock before refueling with fuel.
  ● Be careful not to admit dust, dirt, water or other foreign objects into fuel.
• Do not fill above the top of the fuel filter or it may overflow when the fuel heats up later and expands.
  ● Wipe off spilt fuel thoroughly before starting engine.
• Keep open flames away.

2) CHECK ENGINE OIL

Make sure the engine oil is at the upper level of the oil filler hole. Add oil necessary.

• Remove oil filler cap and check the engine oil level.
• If oil level is below the lower level line, refill with suitable oil to upper level line. Do not screw in the oil filler cap when checking oil level.

- Change oil if contaminated. Oil capacity: (see page 17)

- Recommended engine oil: API Service "SJ"

3) GROUND (Earth)

Make sure to ground (earth) the generator.

4) CONNET BATTERY(for electric starting system)

• Loosen the screw and remove the battery cover.
• Clamp the red wire to the positive (+) terminal and the black wire to the negative (-) terminal of the battery. Do not reverse these positions.
• Be sure the battery is installed on the battery mount tray securely.
  ● Install the cover and tighten the screw.

NOTE:

● Recommended battery: 12V6AH

4. OPERATION

NOTE:

● The generator has been shipped without engine oil. Fill with oil or it will not start.
- Do not tilt the generator when adding engine oil. This could result in overfilling and damage to the engine

1) STARTING THE ENGINE

NOTE:

● Before starting the engine, do not connect the electric apparatus.

A Recoil start

1. Open the fuel tank air vent to the "OPEN" position.
2. Turn the fuel cock lever to the "ON" position.
3. Turn the engine switch to the "ON" or "RUN" position.

4. Turn the choke lever to the " | ▼ | "position. Not necessary if the engine is electric type.

5. Pull the starter handle slowly until resistance is felt. This is the "Compression" point. Return the handle to its original position and swiftly. Do not fully pull out the rope. After starting, allow the starter to return to its original position while still holding the handle. Grasp carrying handle firmly to prevent the generator from falling over pulling the recoil starter.

6. Warm up the engine.

7. Tum the choke lever back to the operating position. Not necessary if the engine is electric type.

8. Warm up the engine without a load for a few minutes.

B Electric start

1. Open the fuel tank air vent to the "OPEN" position.
2. Turn the fuel cock lever to the "ON" position.
3. Turn the engine switch to the "START" position.
4. Turn the engine switch to the "RUN" position

1. Warm up the engine without a load for a few minutes.

C Remote start

1. Open the fuel tank air vent to the "OPEN" position.
2. Turn the fuel cock lever to the "ON" position.
3. Turn the engine switch to the "RUN" position.
4. Click remote switch to the "ON" position.
5. Warm up the engine without a load for a few minutes.

(a) Check the AC pilot lamp for proper voltage.
(b) Turn off the switch(es) of the electrical appliance(s) before connecting to the generator.
(c) Insert the pulg(s) of the electrical appliance(s) into the receptacle.

CAUTION:

• Be sure the electric apparatus is turned off before plugging in.
• Be sure the total load is within generator rated output.
• Be sure the socket load current is within socket rated current.
• The economy control switch must be turned to "OFF" when using electric devices that require a large starting current, such as a compressor submergible pump.

2. OVERLOAD INDICATOR LIGHT

The overload indicator light comes on when an overload of a core electrical device is detected, the inverter unit overheats, or the AC voltage rises. The electronic breaker will then activate, stopping power generation in order to protect the generator and any connected electric. The output pilot light (green) will flicker and the overload indicator light (green) turn on, then the engine will stop running. If so please follow the following steps:

(a) Turn off any connected electric devices and stop the engine
(b) Reduce the total wattage of connected electric devices within the

application range.

(c) Check for blockages in the cooling air inlet and around the control unit. If any blockages are found, remove.
(d) After checking, restart the engine.

CAUTION:

● The generator AC output automatically resets when the engine is stopped and then restarted.
- The overload indicator light may come on for a few seconds at first when using electric devices that require a large starting current, such as a compressor or a submergible pump. However, this is not a malfunction.

3. DC APPLICATION (option)

This usage is applicable to 12V battery charging only.

(a) Charging instruction for battery

• Disconnect the leads for the battery.
  ● Make the battery fluid filler cap loose fully.
  ● Fill distilled water to the upper limit, if the battery fluid is low level.
  ● Measure the specific gravity for the battery fluid by using the hydrometer, and calculate the charging time in according with the table shown side.
  ● The specific gravity for the fully charged battery shall be within 1.26 to 1.28. It is recommended to confirm every an hour.

(b) Connect between the DC output socket and the battery terminals using the charging leads. The leads shall be connected making sure of the (+) and (-) polarity.
(c) The DC circuit protector is to be set to "ON" after confirming the connection, if the protector is in "OFF" position.

CAUTION:

- Be sure the economy control switch is turned off while charging the battery.

3) STOPPING THE ENGINE

1. Turn off the power switch of the electric apparatus or disconnect any electric devices.
2. Turn the engine switch to "STOP" position.

Click remote switch to the "OFF" position.

1. Tum the fuel cock lever to "OFF".
2. Tum the fuel tank cap air vent knob counterclockwise to the "CLOSED" position.

5. PERIODIC MAINTENANCE

Regular maintenance is most important for the best performance and safe operation.

Item	Remarks	Pre-operation check (daily)	Initial 1 months or 20 Hr	Every 3 months or 50Hr	Every 6 months or100Hr	Every 12 months or 300Hr
Spark Plug	Check condition adjust gap an clean. Replace if necessary.			●
Engine Oil	Check oil level	●
	Replace		●		●
Oil filter	Clean oil filter				●
Air Filter	Clean. Replace if necessary.			●
Fuel Filter	Clean fuel cock filter. Replace necessary				●
Choke	Check choke operation	●
Valve Clearance	Check and adjust when engi is cold.					●
Fuel Line	Check fuel hose for crack of damage. Replace if necessary	●
Exhaust System	Check for leakage. Retighten replace gasket if necessary	●
	Check muffler screen. Clean / replace if necessary.					●
Carburetor	Check choke operation	●
Cooling system	Check fan damage.					●
Starting system	Check recoil starter operation.	●
Idle speed	Check and adjust engine idle spee					●
Fittings / Fasteners	Check all fittings and fasten correct if necessary.				●
Crankcase breather	Check breather hose for cracks damage. Replace if necessary					●
Generator	Check the pilot light comes on	●

2) ENGINE OIL REPLACEMENT

1. Place the machine on a level surface and warm up the engine for several minutes. Then stop the engine and turn the fuel cock knob to "OFF". Turn the fuel tank cap air vent knob clockwise.
2. Loosen the screw and remove the cover.
3. Remove the oil filler cap
4. Place an oil pan under the engine. Tilt the generator to drain the oil completely
5. Replace the generator on a level surface.
6. Add engine oil to the upper level.
7. Install the oil filler cap
8. Install the cover and tighten the screw
9. Recommended engine oil: (see page 17) API Service "SJ"

CAUTION:

• Be sure no foreign material enters the crankcase.
• Do not tilt the generator when adding engine oil. This could result in overfilling and damage to the engine
  ● Clean the oil filter every other 100hr.

3) AIR FILTER

Maintaining an air cleaner in proper condition is very important. Dirt induced through improperly installed, improperly serviced, or inadequate elements damages and wears out engines. Keep the element always clean.

1. Remove the cover.
2. Remove the air filter cover and element.
3. Wash the element in solvent and dry.
4. Oil the element and squeeze out excess oil. The element should be wet but not dripping.
5. Insert the element into the air filter.
6. Install the cover

CAUTION:

The engine should never run without the element; excessive piston cylinder wear may result.

4) CLEANING AND ADJUSTING SPARK PLUG

1. Remove the cover.
2. Check for discoloration and remove the carbon.
3. Check the spark plug type and gap.
4. Install the spark plug.
5. Install the cover

Standard electrode color: Tan Color

Standard Spark Plug: CR4HSB (NGK)

Spark Plug Gap: 0.6-0.7 mm (0.024-0.028 in)

5) FUEL TANK FILTER

1. Remove the fuel tank cap and filter.
2. Clean the filter with solvent. If damaged, replace.
3. Wipe the filter and insert it.

! WARNING

- Be sure the tank cap is tightened securely.

6) MUFFLER SCREEN

! WARNING

● The engine and muffler will be very hot after the engine has been run.
● Avoid touching the engine and muffler while they are still hot with any part of your body or clothing during inspection or repair.

1. Remove the cover.
2. Remove the muffler screen.

3. Use the flathead screw driver to pry the spark arrester out from the muffler

4. Remove the carbon deposits on the muffler screen and spark arrester using a wire brush.

5. Install the muffler screen.
6. Install the cover

6. TROUBLE SHOOTING

1) Engine won't start

1. Fuel systems

No fuel supplied to combustion chamber.

● No fuel in tank....Supply fuel.
● Fuel in tank....Fuel tank cap air vent knob to "ON", fuel cock knob to "ON".
● Clogged fuel line....Clean fuel line.
● clogged carburetor....Clean carburetor.

1. Engine oil system

Insufficient

● Oil level is low....Add engine oil.

1. Electrical systems

Poor spark

• Spark plug dirty with carbon or wet....Remove carbon or wipe spark plug dry.
  ● Faulty ignition system....Consult dealer.

• Compression insufficient

● Worn out piston and cylinder....Consult dealer.

2) Generator won't produce power

Safety device (AC) to "OFF" ...Stop the engine, then restart.

Safety device (DC) to "OFF" ...Press to reset the DC protector

7. STORAGE

Long term storage of your machine will require some preventive procedures to guard against deterioration.

1) DRAIN THE FUEL

1. Remove the fuel tank cap, drain the fuel from the fuel tank
2. Remove the cover, drain fuel from the carburetor by loosening the drain screw.

2）ENGINE

1. Remove the spark plug, pour in about one tablespoon of SAE 10W30 or 20W40 motor oil into the spark plug hole and reinstall the spark plug.
2. Use the recoil starter to turn the engine over several times (with ignition off).
3. pull the recoil starter until you feel compression.
4. Stop pulling.
5. Clean exterior of the generator and apply a rust inhibitor.
6. Store the generator in a dry, well-ventilated place, with the cover place over it.
7. The generator must remain in a vertical position.

8. SPECIFICATION

MODEL			2600i	3500i
GENERATOR	Type		Inverter Generator
	AC Voltage	50Hz	100, 230V, 240V
		60Hz	100, 120V, 240V
	Max. Output		2.6 kW	3.5 kW
	Rated Output		2.3 kW	3.0 kW
	Power Factor		1.0
	DC Output		12V / 5.0A
ENGINE	Model		XY152F-3	XY157F-1
	Type		Air-cooled, 4 cycle, OHC, Gasoline Engine
	Bore×Stroke mm×mm		52.4×57.8	57.4×57.8
	Displacement		124.6cc	149.5cc
	Max. Output		3.5KW / 5500rpm	4.0KW / 5500rpm
	Fuel		Regular Automobile Gasoline
	Fuel tank Capacity		7.5 liters
	Rated Continuous Operation		4h10min (100% Load)5h30min (50% Load)	3h5min (100% Load) 4h10min(50% Load)
	Lubricating oil		SAE 10W30
	Lubricating oil Capacity		0.9 liter
	Starting System		Recoil Starter
	Ignition system		C.D.I.
	Spark Plug: Type		A7RTC
DIMENSION	Net dimension L×W×H		565×320×470
	Overall dimension L×W×H		595×355×510
	Net Weight		28 Kg	29 Kg
	Dry Weight		31Kg	32 Kg

• Specifications subject to change without prior notice.

9. WIRING DIAGRAM

2600i, 3500i

2600i, 3500i

BL	BLACK	Br	BROWN
BU	BLUE	R	RED
G	GREEN	W	WHITE
Y	YELLOW	O	ORANGE
P	PURPLE	Y/G	YELLOW/GREEN
GR	GRAY	PI	PINK

ENGINE SWITCH CONTINUITY

ENGINE SWITCH CONTINUITY