Angled studio view of the Simpson portable generator featuring a silver frame, black fuel tank, and red CRX engine.
Side view highlighting the black fuel tank, red recoil starter, and silver protective roll cage.
Angled front view of the generator showcasing the control panel with outlets, the red engine switch, and the CRX 225 engine.
Front view focusing on the control panel layout, main breaker, and the side of the alternator.
Angled rear view showing the generator alternator, black muffler assembly with heat shield, and silver steel frame.
Rear view of the generator displaying the alternator housing, muffler system, and rubber vibration feet.
Side profile view showing the engine components including the OHV cover, air filter, and exhaust heat shield.
Close-up of the red CRX engine recoil starter assembly showing the cooling vents and pull handle.
Close-up detail of the control panel featuring the engine switch, 20A circuit breakers, and covered 120V outlets.
Close-up view of the power outlets showing the 120V duplex, 120V twist lock, and 120V RV-ready receptacle.
Top-down close-up view of the black metal fuel tank showing the fuel cap, fuel gauge, and safety labels.
Infographic displaying the generator specifications: 4500 Starting Watts, 3 Year Warranty, GFCI protection, and dimensions of 23 x 17 x 17 inches.
Composite image showing four detailed close-ups: the red CRX 225 engine, the control panel with outlets, the heavy-duty roll cage frame, and the fuel tank top.
Lifestyle image of a person pouring gasoline from a red can into the generator's fuel tank on a grassy lawn.
Lifestyle image showing the portable generator set up at a campsite with a tent and people relaxing in hammocks in the background.
Angled studio view of the Simpson portable generator featuring a silver frame, black fuel tank, and red CRX engine.
Side view highlighting the black fuel tank, red recoil starter, and silver protective roll cage.
Angled front view of the generator showcasing the control panel with outlets, the red engine switch, and the CRX 225 engine.
Front view focusing on the control panel layout, main breaker, and the side of the alternator.
Angled rear view showing the generator alternator, black muffler assembly with heat shield, and silver steel frame.
Rear view of the generator displaying the alternator housing, muffler system, and rubber vibration feet.
Side profile view showing the engine components including the OHV cover, air filter, and exhaust heat shield.
Close-up of the red CRX engine recoil starter assembly showing the cooling vents and pull handle.
Close-up detail of the control panel featuring the engine switch, 20A circuit breakers, and covered 120V outlets.
Close-up view of the power outlets showing the 120V duplex, 120V twist lock, and 120V RV-ready receptacle.
Top-down close-up view of the black metal fuel tank showing the fuel cap, fuel gauge, and safety labels.
Infographic displaying the generator specifications: 4500 Starting Watts, 3 Year Warranty, GFCI protection, and dimensions of 23 x 17 x 17 inches.
Composite image showing four detailed close-ups: the red CRX 225 engine, the control panel with outlets, the heavy-duty roll cage frame, and the fuel tank top.
Lifestyle image of a person pouring gasoline from a red can into the generator's fuel tank on a grassy lawn.
Lifestyle image showing the portable generator set up at a campsite with a tent and people relaxing in hammocks in the background.
Simpson

SIMPSON SPG3640 Portable Gas Generator 4500 Starting Watts 3600 Running CRX 225 Engine RV Ready Jobsite Backup

In stock
SKU: SPG3640
$599.00
Description

Reliable Power for Work, Play, and Emergencies

Call or Email for Availability and Shipping:
281-351-2211 - Sales@HilltopTool.com

Power your next adventure or project with the SIMPSON® SPG3640 Portable Generator. Engineered for versatility and endurance, this generator is the ultimate solution for tailgating, camping, job site tool charging, and emergency home backup. At its core is the robust CRX® 225 engine, a 224cc powerhouse designed to deliver consistent performance under load. With 4,500 starting watts and 3,600 running watts, you have ample power to run essential appliances, RV systems, and heavy-duty power tools without skipping a beat.

Built to withstand the rigors of daily use, the SPG3640 features a heavy-duty, welded steel roll cage frame that provides superior durability and protection in rough environments. It is equipped with a large 3.96-gallon fuel tank that delivers an impressive 10.5 hours of run time at 25% load, ensuring you spend more time working and less time refueling. Safety is paramount with a comprehensive control panel featuring GFCI-protected outlets and an automatic low-oil shutdown sensor to prevent engine damage. Whether you are powering a travel trailer via the RV-ready TT-30R outlet or keeping the lights on during a storm, SIMPSON delivers power you can trust.

**Note: This unit is 49-State Compliant and does not ship to California.**

Key Features

  • High Output: Delivers 4,500 starting watts and 3,600 running watts for versatile power application.
  • CRX® Engine: Powered by a reliable CRX® 225 (224cc) engine with low oil shutdown protection.
  • Extended Run Time: Runs for up to 10.5 hours at 25% load on a full 3.96-gallon tank.
  • RV Ready: Includes a TT-30R 30A RV receptacle for direct camper connection.
  • Rugged Protection: Heavy-duty roll cage frame protects the engine and alternator from impact.
  • Safety First: Features GFCI protection on outlets to prevent electrical shock.
  • Compact Design: Weighs only 95 lbs with a compact footprint for easier transport and storage.
  • Versatile Outlets: Equipped with RV, Twist Lock, and Duplex outlets to handle various plug types.

Available for pickup at our Tomball, TX location:

30702 State Highway 249
Tomball, Texas 77375 

Monday-Friday 7am-5pm CST 
Saturday 7am-1pm CST

Specifications

Brand SIMPSON
Model SPG3640
Running Watts 3,600 Watts
Starting Watts 4,500 Watts
Engine CRX® 225 (224cc) w/ Low Oil Shutdown
Fuel Tank Capacity 3.96 Gallons
Run Time @ 25% Load 10.5 Hours
Run Time @ 50% Load 8.0 Hours
Outlets (1) 120V 30A RV (TT-30R), (1) 120V 30A Twist Lock (L5-30R), (1) 120V 20A Duplex (5-20R)
Dimensions (L x W x H) 23" x 17" x 17"
Product Weight 95 lbs
Warranty 3 Year Consumer / 6 Month Commercial

Pro-Tip: To ensure your generator starts easily after long periods of storage, always use a fuel stabilizer in your gas tank. Modern ethanol-blended fuels can degrade in as little as 30 days, clogging the carburetor and causing starting issues. A small amount of stabilizer keeps your fuel fresh for up to 24 months.