FIRMAN P03503 Gas Portable Generator 4450/3550W Recoil Start 120V with CO alert 1 / 13
FIRMAN Power Equipment

FIRMAN P03503 Gas Portable Generator 4450/3550W Recoil Start 120V with CO alert FIRMAN P03503 Gas Portable Generator 4450/3550W Recoil Start 120V with CO alert

SKU: P03503

Brand FIRMAN Power Equipment In Stock
$789.99 In Stock
California shipping restriction

This FIRMAN generator is not certified to ship to California and cannot be shipped to a California address.

No sales tax collected at checkout where applicable.
5% off Save 5% on eligible items Copy this code and apply it at checkout when eligible. Code: GET5
Extra 5% offUse GET5 at checkout

Applies to eligible items.

Estimated delivery Calculating current delivery window…
Secure checkoutProtected payment Free shippingView shipping policy Eligible returnsView return policy Authorized dealerFIRMAN Power Equipment warranty
Free shippingAuthorized dealer

Will this run what you need?

Check your setup with our team.

Call our teamOpen Power Planner
Shipping & returnsDelivery details, return eligibility & fees

Shipping
Free shipping. Check the availability and delivery information above for your selected option.

Returns

Approval is required. The 30-day window covers eligible products that have not been used or installed, with their original packaging and supplied contents retained.

For non-defective returns, you pay return shipping and may incur restocking charges of up to 20%. Processing fees of 3–4% are not refundable. The full policy explains exceptions and how to request a return.

Shipping policy ↗Return policy ↗

Secure checkout · Protected payment
Authorized dealer · FIRMAN Power Equipment warranty

No sales tax collected at checkout where applicable.

Key features
  • Weight 109 lbs
Need help choosing? Find the right setup for you. Talk it through with our team, or size your system with the Power Planner. Call 1-844-747-6767 Open Power Planner

Quantity

Your selection

FIRMAN P03503 Gas Portable Generator 4450/3550W Recoil Start 120V with CO alert

In Stock
FIRMAN P03503 Gas Portable Generator 4450/3550W Recoil Start 120V with CO alert
Quantity$789.99 each
1

The FIRMAN P03503 portable generator is built to handle your outdoor adventures, home improvement projects, or emergency backup power with confidence. Delivering 4,450 starting watts and 3,550 running watts, this unit is equipped with a reliable 208cc engine and a 5-gallon fuel tank, offering an impressive runtime of up to 14 hours at 50% load.

Whether you're powering tools, appliances, or your RV setup, the P03503 provides consistent performance and unmatched value. The multi-feature control panel makes operation simple and efficient, while its robust build ensures long-term reliability.

With the FIRMAN P03503, you get powerful, reliable performance wherever and whenever you need it.

The P03503 comes with a cover, engine oil bottle, oil funnel, spark plug wrench, and two double open-ended wrenches (10mm x 12mm).

Compare backup options

Our gas versus solar generator guide explains the practical differences between fuel-powered and battery-based backup systems.

Package Includes
1 FIRMAN P03503 generator
Package Includes
1 Generator cover
Package Includes
1 Engine oil bottle
Package Includes
1 Funnel
Package Includes
1 Spark plug wrench
Package Includes
2 Double open-ended wrench
Specifications
Selected variant SKU P03503
Model P03503
Fuel Type Gas powered
Power Output 4450 W starting / 3550 W running
Engine 208cc OHV
Start Method Recoil start
Runtime Up to 14 hours at 50% load
Fuel Tank Capacity 5 gallons
Dimensions 24.8 in L x 21.7 in W x 21.7 in H
Weight 109 lb
Outlet Configuration L5-30R x1 30A/120V twist-lock; TT-30R x1 30A/120V RV-ready; 5-20R x2 20A/120V duplex
CO Safety CO Alert technology with indicator light
Display 4-in-1 Data-Minder multi-meter; digital display
Electrical Configuration Neutral floating
Portability 8-inch never-flat wheels; single folding handle
Warranty 3 years
📘
User Manual
Installation instructions, setup guidance, operation, and troubleshooting.
View PDF
📘
User Manual
Installation instructions, setup guidance, operation, and troubleshooting.
View PDF
📘
User Manual
Installation instructions, setup guidance, operation, and troubleshooting.
View PDF

Frequently Asked Questions

Clear answers to common questions about this product, setup, compatibility, and use.

What are the listed starting and running watts for FIRMAN P03503? FIRMAN lists 4,450 starting watts and 3,550 running watts for this generator. For dual- and tri-fuel models, output can differ by fuel; use the selected model's manual for fuel-specific ratings. Which fuel does FIRMAN P03503 use? FIRMAN identifies gasoline for this model. Check the manual for fuel setup and operating instructions.