Description
As the largest single-cylinder engine of Honda’s flagship GX range, the Honda GX390 stationary engine is used in all sorts of applications. From pressure washers and construction and industrial equipment, to tillers and cultivators, generators and commercial lawn and garden equipment, it can be found working hard all over Australia.
Due to its power and emissions compliance, heavy-duty forestry equipment, agricultural equipment and water pumps are also powered by the GX390.
Easy on your pocket, hard-working
A digital CDI ignition system with variable timing and an increased compression ratio combines with the GX390’s precision camshaft design to offer precise valve timing and optimal valve overlap for better fuel efficiency.
It draws on decades of Honda engineering with its OHV design, delivering increased efficiency and optimal power transfer where and when you need it.
The use of lightweight, noise-reducing materials and a forged steel crankshaft and rigid crankcase results in an exceptionally quiet engine. An improved piston design reduces mechanical noise, with an overall reduction of engine noise by up to 5 dB.
Proven reliability
The Honda GX390 stationary engine offers precision-engineered components resulting in lower vibration, and a ball bearing-supported crankshaft for greater stability. It also offers an improved piston design and a heavy-duty balancer shaft to deliver smooth performance.
Helical-cut gears, a large-capacity multi-chamber exhaust system and a sophisticated air intake system also make for an exceptionally quiet engine.
And with Oil Alert, a simple throttle control, large fuel tank and automotive-type fuel cap, dual oil drains and fills, an easily accessible spark plug and heavy-duty recoil starter, the GX390’s features go on and on.
3-year warranty
Just like the entire GX engine range, the GX390 is covered by an extensive Honda 3-year domestic and 1-year commercial warranty.
And for those who want a little bit more, available extras include gear reduction options, an electric start option, spark arrester and charge and lamp coils with multiple output options. Low-profile versions are also available.
Specifications
| Model | GX390 |
|---|---|
| Type | 4-stroke, overhead valve, single-cylinder, horizontal shaft |
| Bore & stroke | 88 x 64 mm |
| Displacement | 389 cm³ |
| Compression ratio | 8.0:1 |
| Net power | 8.2kW (11.0HP) at 3,600 rpm |
| Maximum net torque | 25.1 Nm at 2,500 rpm |
| Ignition system | Transistorised magneto ignition |
| Starting system | Recoil (electric starter optional) |
| Cooling system | Forced-air |
| PTO shaft rotation | Counter-clockwise (from PTO side) |
| Fuel consumption at rated power | 3.7 L/h at 3,600 rpm |
| Recommended fuel | Unleaded |
| Lubrication system | Splash |
| Recommended oil | 10W/30 API SG |
| Oil capacity | 1.1 l |
| Fuel tank capacity | 6.1 l |
| Dimensions | 405 x 450 x 443mm |
| Dry weight | 31kg |
| Other options | 2:1 reduction |
