The GX390 is the largest of the GX Range and features power, performance, low fuel consumption, and low emissions into an all-round quality engine.

OVERVIEW

COMMON APPLICATIONS

As the largest of Honda’s flagship GX range of engines, the GX390 is used in all sorts of applications. From Pressure Washers and Construction/Industrial equipment, to Tillers/Cultivators, Generators and Commercial Lawn & 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 gutsy GX390.For a full comparison of the GX390 against other Honda engines, click on the Compare Products icon next to the Share tab, in the top right of this page.

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 & rigid crankcase results in an exceptionally quiet engine – an improved piston design reduces mechancal noise, with an overall reduction of engine noise by up to 5 dB.

PROVEN RELIABILITY

The GX390 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 sophisticated air intake system also makes 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 Warranty.And for those who want a little bit more, available extras include Gear reduction options, Electric start option, Spark arrester and Charge & Lamp Coils with Multiple Output Options. Low profile versions also available.And should there be any issues, a nationwide network of 400+ authorised Honda dealers are there to back you up with all your parts & service requirements.

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 P.T.O. 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 1.1l
FUEL TANK CAPACITY 6.1l
DIMENSIONS 405 x 450 x 443mm
DRY WEIGHT 31kg
OTHER OPTIONS 2:1 Reduction