Model GX160 GX200 GX390
Engine Type Air-cooled 4-stroke OHV Air-cooled 4-stroke OHV Air-cooled 4-stroke OHV
Bore x Stroke 68 X 45 mm 68 X 54 mm 88 X 64 mm
Displacement 163 cm3 196 cm3 389 cm3
Net Power Output* 4.8 HP (3.6 kW) @ 3,600 rpm 5.5 HP (4.1 kW) @ 3,600 rpm 11.7 HP (8.7 kW) @ 3,600 rpm
Net Torque 7.6 lb-ft (10.3 Nm) @ 2,500 rpm 9.1 lb-ft (12.4 Nm) @ 2,500 rpm 19.5 lb-ft (26.4 Nm) @ 2,500 rpm
PTO Shaft Rotation Counterclockwise (from PTO shaft side) Counterclockwise (from PTO shaft side) Counterclockwise (from PTO shaft side)
Compression Ratio 9.0 : 1 8.5:1 8.2:1
Lamp/Charge coil options 25W, 50W / 1A, 3A, 7A 25W, 50W / 1A, 3A, 7A 25W, 50W / 1A, 3A, 10A, 18A
Carburetor Butterfly Butterfly Butterfly Float Type
Ignition System Transistorized magneto Transistorized magneto Digital CDI with variable timing
Starting System Recoil Starter Recoil Starter Recoil/electric
Lubrication System Splash Splash Splash
Governor System Centrifugal Mechanical Mechanical Centrifugal Mass Type
Air cleaner Dual Element Dual element Dual element
Oil Capacity 0.61 US qt. (0.58 L) 0.63 US qt (0.6l) 1.16 US qt (1.1 L)
Fuel Tank Capacity 3.3 U.S. qts (3.1 liters) 3.3 U.S. qts (3.1 liters) 6.4 U.S. qts (6.1 liters)
Fuel Unleaded 86 octane or higher Unleaded 86 octane or higher Unleaded 86 octane or higher
Dry Weight 33 lbs. (15.1 kg) 35 lbs. (16.1 kg) 69 lb (31.5 kg)
