Firman W03663OF Gasoline 3650W/4500W Inverter Open Frame Portable Generator | Remote Start | CO Alert

The Firman W03663OF 3650W/4500W Inverter Portable Generator Delivers Powerful Runtime for Extended Use

The Firman W03663OF Gasoline 3650W/4500W Inverter Open Frame Portable Generator is the ultimate solution for those who need dependable, long-lasting power whether at home, on the road, or in the field. Designed with FIRMAN’s legendary engineering and cutting-edge inverter technology, this generator provides clean, reliable energy to power sensitive electronics, heavy-duty appliances, and essential gear during emergencies.

Whether you're a camper, performer, tradesperson, or homeowner seeking backup power for events or outages, the Firman W03663OF ensures you never skip a beat. With up to 22 hours of runtime at 25% load, electric/remote start options, and eco-mode for fuel efficiency, this portable powerhouse delivers where others fall short.

The Firman W03663OF Gasoline 3650W/4500W Inverter Open Frame Portable Generator isn’t just a machine it’s your silent partner in every plan, from keeping your household running during outages to powering your adventure in the wild. Built by a brand trusted across the world, engineered for performance, and loaded with practical features, this is the generator your customers will rely on again and again.

Firman W03663OF Generator Features

Runs Up to 22 Hours Without Refueling

Enjoy long-lasting power with its 6-gallon fuel tank that delivers up to 22 hours of runtime at 25% load ideal for overnight use, events, or emergencies when refueling isn’t convenient.

Clean Power That Protects Electronics

The inverter technology gives you stable and safe power, perfect for charging phones, laptops, and other sensitive devices without risk of damage or overload.

Start It Easily With Remote or Push Button

You can start the generator your way use the remote control, electric start button, or pull cord. It’s convenient whether you're near or far from the unit.

Eco Mode Saves Fuel Automatically

Eco mode adjusts the engine speed based on how much power you're using. This means it saves fuel, makes less noise, and helps your generator last longer.

Multiple Outlets for All Your Devices

The control panel includes standard household outlets, RV plug, twist-lock port, USB, and 12V DC. You can plug in lights, tools, chargers, and more all at once.

Lightweight and Easy to Move Around

Weighing just 106 lbs, this generator is lighter than most in its class. The open frame makes it easy to lift, load, and carry for home, job site, or travel.

Built Strong With 3-Year Warranty Protection
Made with a durable cast iron engine sleeve and FIRMAN's trusted design, it also includes a 3-year warranty giving you peace of mind and long-term value.

Firman W03663OF Generator Warranty

Firman warrants to the original purchaser that the mechanical and electrical components will be free of defects in material and workmanship for a period of one (1) year (parts and labor) and three (3) years (parts and technical support) from the original date of purchase 90 days [parts and labor] and 180 days [parts] for commercial; industrial use.

If the product is still under warranty and after technical evaluation the product is determined to be defective as a result of manufacturing, not due to misuse or modification of the product, then Firman will replace the product.

What's Included

• 1 x Firman W03663OF Generator
• 1 x Battery Float
• 1 x Charger Cable
• 1 x Tool Kit
• 1 x Engine Oil
• 1 x Oil Funnel
  
• 1 x Battery

Firman W03663OF Generator Manual