Introduzione
This manual provides essential information for the safe and efficient operation, maintenance, and troubleshooting of your Generac GP3500iO Open Frame Portable Inverter Generator. Please read this manual thoroughly before operating the generator to ensure proper use and to prevent injury or damage.

Figura 1: Fronte view of the Generac GP3500iO Portable Inverter Generator, showcasing its control panel and robust frame.
Importante infurmazione di sicurezza
Always follow safety precautions when operating the generator. Failure to do so can result in serious injury or death.
- Periculu di monossidu di carbonu: Generators produce carbon monoxide, an odorless, colorless, and poisonous gas. Operate the generator outdoors only, far away from windows, doors, and vents. Never operate indoors or in enclosed spaces.
- Periculu di scossa elettrica: Do not operate the generator in wet conditions. Ensure all connections are dry and secure. Never connect the generator directly to your home's electrical system without a transfer switch installed by a qualified electrician.
- Periculu d'incendiu: A benzina hè assai inflammabile. Fate u rifornimentu in un locu ben ventilatu cù u mutore spento è raffreddato. Ùn fumate micca è ùn lasciate micca fiamme libere vicinu à u generatore. Conservate u carburante in contenitori appruvati.
- Superfici calde: The generator's engine and muffler become hot during operation. Avoid contact with hot surfaces to prevent burns. Allow the generator to cool before handling or storing.
- Parti in muvimentu: Mantene e mani, pedi è vestiti luntanu da e parti in muvimentu.
- Pruposta 65 Avvertimentu: Stu pruduttu pò espose à i sustanzi chimichi cumpresi u monossidu di carbonu è u benzene, chì sò cunnisciuti da u Statu di California per causà cancer è difetti di nascita o altre dannu riproduttivu. Per più infurmazione vai à www.P65Warnings.ca.gov.
Cumpunenti chjave
Familiarize yourself with the main components of your Generac GP3500iO generator:
- Pannellu di cuntrollu: Features the PowerDial (START/RUN/STOP), outlets, circuit breakers, and indicator lights.
- Cisterna di carburante: Situatu in cima, per a benzina.
- Motore: A fonte d'energia di u generatore.
- Avviatore à rinculo: Adupratu per avviare manualmente u mutore.
- Frame: Durable open frame design for protection and portability.
- Prese USB: For charging sensitive electronic devices.

Figura 2: Side view of the Generac GP3500iO, highlighting its compact design and sturdy frame.
Istituisci
Before first use, or after extended storage, proper setup is crucial:
- Aghjunghjite l'oliu di motore: Locate the oil fill cap/dipstick. Using the provided oil funnel and engine oil, carefully add the correct amount of oil as specified in the owner's manual. Do not overfill.
- Aggiungi carburante: Ensure the generator is on a level surface. Unscrew the fuel cap and fill the tank with fresh, unleaded gasoline. Do not fill above the fill line. Securely replace the fuel cap.
- Posizionamentu: Place the generator on a firm, level surface outdoors, at least 20 feet away from any buildings, windows, or vents. Ensure adequate clearance around the generator for proper ventilation.

Figure 3: The lightweight design of the GP3500iO allows for easy portability and placement during setup.
Istruzzioni di funziunamentu
Follow these steps to start and operate your Generac GP3500iO:
- PowerDial: Turn the PowerDial to the "CHOKE" position (if the engine is cold).
- Start Engine: Tirate fermamente a maniglia di l'avviamentu à rinculu finu à chì u mutore si accenda.
- Posizione di Corsa: Once the engine starts and runs smoothly, slowly turn the PowerDial to the "RUN" position.
- Cunnette i Dispositivi: Plug in your electrical devices to the appropriate outlets. Ensure the total wattage does not exceed the generator's running wattage.
- Modu ecunomicu: For lighter loads, switch on the Economy Mode to reduce engine speed, save fuel, and lower noise levels.
- Chjodi: To turn off the generator, disconnect all electrical loads, then turn the PowerDial to the "STOP" position.
Video 1: Official product video demonstrating the features and portability of the Generac GP3500iO Inverter Generator, including its use at a job site and for charging sensitive electronics.

Figure 4: The GP3500iO in operation at a construction site, providing reliable power for various tools.

Figure 5: The generator providing clean, stable power for sensitive electronics in a recreational setting.
Mantenimentu
Regular maintenance ensures optimal performance and longevity of your generator. Always refer to the full owner's manual for detailed maintenance schedules and procedures.
- Verificate u livellu di l'oliu: Before each use, check the engine oil level and add if necessary.
- Cambia l'oliu: Cambiate l'oliu di u mutore dopu à e prime 20 ore di funziunamentu, dopu ogni 50 ore o una volta à l'annu, quellu chì vene prima.
- Filtru di l'aria pulita: Ispettate è pulite u filtru di l'aria regularmente. Rimpiazzate s'ellu hè dannighjatu.
- Spark Plug: Inspect the spark plug annually and replace if worn.
- Sistema di carburante: Use a fuel stabilizer if storing the generator for more than 30 days to prevent fuel degradation.
Risoluzione di prublemi
Eccu sò e soluzioni à i prublemi cumuni chì pudete scuntrà:
| Prublemu | Causa Possibile | Soluzione |
|---|---|---|
| U mutore ùn principia micca | No fuel, low oil, choke not set, old fuel, spark plug issue. | Add fresh fuel, add oil, set choke, drain old fuel and refill, check/replace spark plug. |
| Nisuna pruduzzione di putenza | Circuit breaker tripped, overload, economy mode engaged with high load. | Reset circuit breaker, reduce load, disengage economy mode for higher loads. |
| U mutore gira ruvida | Stale fuel, dirty air filter, dirty spark plug. | Drain and refill with fresh fuel, clean/replace air filter, clean/replace spark plug. |
If issues persist, consult a qualified service technician or contact Generac customer support.
Specificazioni
| Feature | Detail |
|---|---|
| Marca | Generac |
| Nome di mudellu | GP3500iO |
| Numeru di mudellu di l'articulu | 7128 |
| Cumincià Wattage | 3500 Watt |
| Corsu Wattage | 3000 Watt |
| Tipu di carburante | A benzina |
| Tipu di mutore | 4 Corsu |
| Cilindrata di u mutore | 212 centimetri cubi |
| Volume di u tank | 2.37 Galloni |
| Runtime | 11 ore (à 25% di carica) |
| Pesu di l'articulu | 74.3 liri |
| Dimensioni di u produttu (L x W x H) | 19.7" x 16.5" x 16.4" |
| Voltage | 120 Volts |
| Frequency | 60 Hz |
| Prise di putenza tutali | 4 (various types including USB) |
| Funzioni spiciali | Portable, Super Quiet, Low Oil Shutdown, Hour Meter, POWERRUSH Technology |

Figure 6: Detailed dimensions of the Generac GP3500iO for planning storage and transport.
Garanzia è Supportu
For specific warranty details, please refer to the warranty card included with your product or visit the official Generac website. Generac provides customer support for product inquiries, technical assistance, and service needs.
You can often find support resources, FAQs, and contact information on the manufacturer's websitu o per mezu di centri di assistenza autorizzati.
For additional information or to purchase accessories, visit the Negoziu Generac nant'à Amazon.





