Gx390 lf main

GX390 (13 hp)

Loads of power, exceptional fuel consumption. The engine for water pumps, pressure washers, small vehicles and more.

GX390 Features and applications

Features

Digital CDI ignition system with variable timing
Precision camshaft design for precise valve timing and optimal valve overlap
Ball-bearing supported crankshaft for improved stability
Dual oil drains and fill
Multiple charging coil options

Applications

Pressure washers
Commercial lawn and garden equipment
Tillers/cultivators
Forestry equipment
Generators
Construction/industrial equipment
Agricultural equipment
Small vehicles
Water pumps

GX390 Specifications

Engine type air-cooled 4-stroke overhead valve single cylinder
Bore x Stroke 88 x 64 mm (3.5 x 2.5 in)
Displacement 389 cc (23.7 cu-in)
Net power output 8.7 kW (11.7 hp) @ 3 600 rpm
Net torque 26.5 Nm (19.5 lb-ft) @ 2 500 rpm
PTO shaft rotation counterclockwise (from PTO shaft side)
Compression ratio 8.2 : 1
Fuel tank capacity 6.1 L (1.3 CA gal, 1.6 US gal)
Carburetor horizontal type, butterfly type
Ignition system digital CDI with variable ignition timing
Lubrication system forced splash
Governor system centrifugal mechanical
Oil capacity 1.1 L (0.97 qt (Imp), 1.16 US qt)
Fuel unleaded gasoline with a pump octane rating of 86 or higher

GX390 Engine types / Horizontal Crankshaft

Model code PTO type PTO diameter/taper PTO reduction Starter Oil alert (shut down) Air filter type
straight 1" no recoil/electric yes dual element
straight 1" no recoil yes dual element
straight 1" no recoil/electric yes dual element
straight 1" no recoil yes cyclone
Gx390ut2 q type
X3902QAE Download diagram
PTO type straight
PTO diameter/taper 1"
PTO reduction no
PTO bolt size 3/8 - 24 UNF
Starter recoil/electric
Oil alert (shut down) yes
Air filter type dual element
Muffler type standard
Loading coil 3A
Dry weight 31.7 kg (69.9 lb)
Model code GCBCT
Gx390ut2 q type
X3902QAPW Download diagram
PTO type straight
PTO diameter/taper 1"
PTO reduction no
PTO bolt size 3/8 - 24 UNF
Starter recoil
Oil alert (shut down) yes
Air filter type dual element
Muffler type standard
Loading coil no
Dry weight 31.7 kg (69.9 lb)
Model code GCBDT
Gx390ut2 q type
X3902QNR Download diagram
PTO type straight
PTO diameter/taper 1"
PTO reduction no
PTO bolt size 3/8 - 24 UNF
Starter recoil/electric
Oil alert (shut down) yes
Air filter type dual element
Muffler type standard
Loading coil 18A
Dry weight 31.7 kg (69.9 lb)
Model code GCBCT
Gx390ut2 q type
X3902QXC Download diagram
PTO type straight
PTO diameter/taper 1"
PTO reduction no
PTO bolt size 3/8 - 24 UNF
Starter recoil
Oil alert (shut down) yes
Air filter type cyclone
Muffler type standard
Loading coil no
Dry weight 31.7 kg (69.9 lb)
Model code GCBCT