1. Introducció
This manual provides essential instructions for the safe operation, maintenance, and troubleshooting of your FIRMAN P03504 Gas Portable Generator. Please read this manual thoroughly before operating the generator to ensure proper use and to prevent injury or damage.

Image 1.1: The FIRMAN P03504 Gas Portable Generator. This image displays the overall design of the generator, including its frame, engine, control panel, and wheels.
The FIRMAN P03504 is a gas-powered portable generator designed to provide 4450 starting watts and 3550 running watts. It features a 208cc engine, a 5-gallon fuel tank for extended runtime, and a CO Alert system for enhanced safety. This generator is suitable for various applications, including home backup, RV use, and outdoor power needs.
2. Informació de seguretat
Operating a generator safely is paramount. Always follow all safety warnings and instructions provided in this manual.
2.1 Carbon Monoxide (CO) Alert System
This generator is equipped with a built-in CO Alert system. Carbon monoxide is a colorless, odorless, and poisonous gas. The CO Alert system is designed to detect hazardous levels of carbon monoxide and automatically shut down the engine to prevent CO accumulation around the generator. If the CO Alert indicator light illuminates, move the generator to an open, well-ventilated area immediately and allow it to cool before attempting to restart.

Image 2.1: Close-up of the CO Alert indicator light on the generator's control panel. This light indicates when the CO Alert system has detected dangerous carbon monoxide levels or a system fault.
2.2 Precaucions generals de seguretat
- No feu mai funcionar el generador en interiors ni en espais tancats. Generators produce carbon monoxide exhaust, which can be fatal.
- Ensure adequate ventilation when operating the generator outdoors. Position it away from windows, doors, and vents.
- Mantingueu els nens i les mascotes allunyats del generador durant el funcionament.
- Do not refuel the generator while it is running or hot. Allow it to cool down before adding fuel.
- Emmagatzemar el combustible en recipients homologats en una zona ben ventilada i allunyat de fonts d'ignició.
- Always ground the generator properly before use.
- Wear appropriate personal protective equipment (PPE) when handling the generator.
3. Desembalatge i muntatge
Carefully unpack the generator and all included components. Inspect for any shipping damage. If damage is found, contact customer support immediately.
3.1 Components inclosos
The following items are typically included with your FIRMAN P03504 generator:
- FIRMAN P03504 Generator Unit
- Wheel Kit (includes wheels, axles, and mounting hardware)
- Ampolla d'oli de motor
- Embut d'oli
- Clau de bugia
- Dues claus de doble punta oberta (10 mm x 12 mm)
- Single folding handle
- Manual del propietari

Image 3.1: Visual representation of the included accessories: tool kit, engine oil bottle, oil funnel, spark plug wrench, two double open-ended wrenches, single folding handle, and 8-inch never-flat wheels.
3.2 Wheel Kit Installation
To install the wheel kit:
- Carefully tilt the generator to access the axle mounting points.
- Attach the axles to the generator frame using the provided hardware.
- Slide the wheels onto the axles and secure them with the appropriate pins or nuts.
- Attach the folding handle to the designated mounting points on the frame.
4. Configuració
Before starting the generator for the first time, it is crucial to add engine oil and fuel.
4.1 Afegir oli de motor
The generator is shipped without engine oil. Operating the engine without sufficient oil will cause severe damage and void the warranty. Use the provided oil funnel to add the recommended type and amount of oil.
- Localitzeu el tap/vareta d'ompliment d'oli.
- Remove the cap and slowly pour the engine oil into the crankcase using the funnel.
- Check the oil level with the dipstick; it should be at the 'Full' mark.
- Securely replace the oil fill cap. The generator features a low oil shutoff to prevent engine damage if oil levels become too low during operation.
4.2 Afegir combustible
The FIRMAN P03504 operates on gasoline. Always use fresh, unleaded gasoline with an octane rating of 87 or higher.

Image 4.1: The FIRMAN P03504 generator with an overlay indicating it is 'GAS FUELED'. This highlights the fuel type required for operation.
- Ensure the generator is turned off and has cooled down before refueling.
- Open the fuel cap on the 5-gallon steel tank.
- Slowly add gasoline, being careful not to overfill. Leave some space for fuel expansion.
- Torneu a col·locar el tap de combustible de manera segura.

Image 4.2: Graphic illustrating the generator's 5-gallon fuel tank, 14 hours of runtime at 50% load, 208cc OHV engine, and CO Alert system.
5. Instruccions de funcionament
Follow these steps to start and operate your FIRMAN P03504 generator.
5.1 Starting the Generator (Recoil Start)
- Assegureu-vos que el generador estigui sobre una superfície plana i en una zona exterior ben ventilada.
- Comproveu els nivells d'oli i combustible.
- Gireu la vàlvula de combustible a la posició 'ON'.
- Moveu la palanca de l'estrangulador a la posició «CHOKE» (si el motor està fred).
- Gireu l'interruptor del motor a la posició 'ON'.
- Firmly grasp the recoil starter handle and pull it slowly until resistance is felt, then pull quickly and smoothly to start the engine.
- Un cop el motor s'hagi engegat, moveu lentament la palanca de l'estrangulador a la posició "RUN".

Imatge 5.1: acabatview of generator features, highlighting the recoil start mechanism for easy engine ignition.
5.2 Connexió de càrregues elèctriques
Once the generator is running smoothly, you can connect your electrical devices. The generator is equipped with multiple outlets to handle various power requirements.

Image 5.2: Illustrates the generator's capability to power various items such as portable AC units, power tools, RVs, appliances, smartphones, and laptops.
- Assegureu-vos el wat totaltagLa potència dels dispositius connectats no supera la potència de funcionament del generadortage (3550W).
- Plug in devices one at a time.
- Avoid overloading circuits.
5.3 Aturar el generador
- Desconnecteu totes les càrregues elèctriques del generador.
- Deixeu que el generador funcioni durant uns minuts sense càrrega perquè es refredi.
- Gireu l'interruptor del motor a la posició 'OFF'.
- Gireu la vàlvula de combustible a la posició 'OFF'.
6. Manteniment
Un manteniment regular garanteix la longevitat i el rendiment fiable del vostre generador.
6.1 Manteniment del motor
The FIRMAN P03504 features a durable 208cc 4-stroke engine with a cast iron sleeve, designed for consistent performance. Regular checks are recommended.

Imatge 6.1: Primer pla view of the generator's engine area, emphasizing its robust construction and components.
- Canvi d'oli: Change engine oil after the first 20 hours of operation, then every 50-100 hours or annually.
- Filtre d'aire: Inspeccioneu i netegeu el filtre d'aire cada 50 hores o amb més freqüència en condicions de molta pols. Substituïu-lo si està malmès.
- Bujía: Inspect the spark plug every 100 hours. Clean or replace as needed using the provided spark plug wrench.
- Filtre de combustible: Check and clean the fuel filter periodically.
6.2 Emmagatzematge
For long-term storage, prepare the generator as follows:
- Buideu el dipòsit de combustible i el carburador o afegiu un estabilitzador de combustible.
- Canviar l'oli del motor.
- Traieu la bugia i aboqueu una petita quantitat d'oli de motor al cilindre. Estireu l'arrencador de retrocés unes quantes vegades per distribuir l'oli i, a continuació, torneu a instal·lar la bugia.
- Netegeu l'exterior del generador.
- Emmagatzemar en un lloc net, sec i ben ventilat.
7. Solució De Problemes
Aquesta secció tracta els problemes habituals que podeu trobar amb el vostre generador.
| Problema | Causa possible | Solució |
|---|---|---|
| El motor no arrencarà | Sense combustible Baix nivell d'oli Interruptor del motor OFF L'estrangulador no està ben ajustat Problema amb la bugia | Afegiu combustible fresc Afegiu oli per al motor Enceneu l'interruptor del motor Ajustar la palanca de l'estrangulador Inspeccionar/netejar/substituir la bugia |
| El motor arrenca i després s'atura | Baix nivell d'oli CO Alert activated Combustible ranci | Afegiu oli per al motor Move generator to open area, allow to cool Buidar i omplir amb combustible nou |
| Sense potència de sortida | L'interruptor automàtic es va disparar Sobrecàrrega | Reinicialitza l'interruptor Reduir la càrrega connectada |
If you encounter issues not listed here or if solutions do not resolve the problem, contact FIRMAN customer support.
8. Especificacions
Detailed technical specifications for the FIRMAN P03504 Gas Portable Generator.

Image 8.1: Visual representation of the generator's dimensions (24.8"L x 21.7"W x 21.7"H) and weight (108.5 lbs).
| Especificació | Valor |
|---|---|
| Marca | Firmà |
| Nom del model | Gas Portable Generator 4450W Recoil Start 120V with CO alert |
| Número de part | P03504 |
| Començant Wattage | 4450 watts |
| Corrent Wattage | 3550 watts |
| Voltage | 120 Volts |
| Tipus de combustible | Gasolina |
| Tipus de motor | 208cc 4 Stroke OHV |
| Volum del dipòsit | 5 galons |
| Temps d'execució (50% de càrrega) | Fins a 14 hores |
| Pes de l'article | 108.5 lliures |
| Dimensions del producte (L x A x A) | 24.8" x 21.7" x 21.7" |
| Característiques especials | Automatic Shut Down, CO Sensor, Fuel Efficient, Portable |
| Material | Iron & Cast Iron, Plastic |
| Preses de corrent total | 1 (Note: Product image shows multiple outlets, this spec might be generalized. Refer to product for exact outlet configuration.) |
| UPC | 840876135044 |
9. Garantia i Suport
9.1 Informació de la garantia
The FIRMAN P03504 Gas Portable Generator typically comes with a 3-year limited warranty. Please refer to the warranty card included with your product for specific terms, conditions, and registration details.
9.2 Atenció al client
For technical assistance, parts, or warranty claims, please contact FIRMAN customer support. Contact information can usually be found in your owner's manual or on the official FIRMAN weblloc.
For additional information or to explore other FIRMAN products, visit the Botiga Firman.





