GX390 13HP Engine w/Threaded Shaft and Electric Start

- Engine Type: Air-cooled, 4-Stroke, OHV, single cylinder
- Bore x Stroke: 3.5" x 2.5" (88 x 64 mm)
- Displacement: 24 cu in (389 cm3)
- Compression Ratio: 8.2 : 1
- Net Power (kW/rpm)*: 11.7 hp (8.7 kW) at 3,600 rpm
- Net Torque*: 19.5 lbs ft (26.4 s) at 2,500 rpm
- PTO Shaft Rotation: Counterclockwise (from PTO shaft side)
- Ignition System: Digital CDI with variable ignition timing
- Starting System: Recoil Starter
- Carburetor: Butterfly
- Lubrication System: Splash
- Governor System: Centrifugal Mass Type
- Air Cleaner: Dual Element
- Oil Capacity: 1.16 US qt (1.1 L)
- Fuel Tank Capacity: (liter) 6.4 US qt (6.1 L)
- Evaporative Emissions: Low permeation hose and purge joint provided
- Exhaust Emissions: Certified for use in all 50 states
- Dimensions (L x W x H): Q-Shaft 16.0" (407 mm) x 19.1" (485 mm) x 17.7" (449 mm)
- Dry Weight: 69 lbs (31.5 kg)