with Electric Start — 389cc, GX Series, 1in. x 3 31/64in. Shaft, Model# GX390UT2QNE2

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Genuine Honda Performance

Genuine Honda Performance


Honda's Experience Counts

There are many reasons to insist on genuine Honda engines — reasons like less down time, lower costs of ownership and better performance. As the world's largest engine manufacturer, Honda offers more engine experience than anyone, experience born on racetracks and roadways around the globe. Honda has a well-earned reputation for engine quality and performance. When you choose a Honda engine, or a product powered by Honda, you know what you're getting: an engine you can count on, now and in the future.

Commercial-Grade Honda GX Series

The Honda GX Series OHV commercial-grade engine is designed to perform in the most demanding commercial applications and has set the industry standard for reliability and durability. It's the preferred engine for construction equipment, pressure washers, compressors, go-karts, log splitters and more.


Insist on the Best


Superior Performance

Better fuel efficiency. Higher power output. Quieter performance. Easier use. No matter how you define superior engine performance, Honda engines set the standard, with best-in-class engineering and technology.

Legendary Easy Starting

Honda engines are renowned for being consistently easy to start. With a unique automatic mechanical decompression system, heavy-duty recoil ropes and advanced variable ignition timing, Honda engines are designed with quick, easy starts in mind.

Environmental Focus

Honda is committed to producing one engine for use in all 50 states. Honda engines meet the new, more stringent CARB emission requirements, and will be ready for the future lower EPA and CARB standards as they are introduced. Additionally, Honda engines meet CARB exhaust emission requirements without the use of a catalytic converter.

Insist on the Best
A Brand You Can Trust

A Brand You Can Trust


Superior Reliability and Quality

Honda sets the standard for reliable, hard-working engines, built with high-quality components designed for optimum performance in the harshest environments. Honda stands behind its engines with an industry-leading 3-year limited commercial warranty on all GX engines 100cc and larger.

Nationwide Parts and Service Support

Honda understands the importance of getting you back to work quickly. Honda has a vast nationwide support network of over 14,000 dealers. From parts to service, Honda engine dealers are there to assist you whenever and wherever you need it.


Features + Benefits

Features for Honda Horizontal OHV Engine with Electric Start — 389cc, GX Series, 1in. x 3 31/64in. Shaft, Model# GX390UT2QNE2
  • Honda 389cc GX OHV air-cooled, 4-stroke, horizontal engine
  • Fuel efficient, high-output operation with precision camshaft design and a high compression ratio
  • OHV design delivers increased efficiency and optimal power transfer
  •  Digital CDI ignition system with variable timing
  • Smooth performance and reduced vibration from precision-balanced crankshaft and reduced piston weight
  • Ball bearing-supported crankshaft offers greater stability
  • Aluminum push roads reduce both valve clearance and noise level
  • Muffler, breather valve, case cover, air intake system, rigid crankcase, helical-cut gears and lightweight materials are also designed to reduce noise level
  • Oil alert protects engine
  • Carburetor coating and filter help protect fuel from impurities
  • Cast iron cylinder sleeve
  • Reliability comes from high-quality materials, fit and finish
  • Dual-element air cleaner
  • Easy to use and maintain with simple throttle control, large fuel tanks, wide-mouth automotive-style fuel cap, dual oil fills and drains, easy to use control box and easily accessible spark plug
  • Get quick starts with the heavy-duty recoil starter with ergonomic design and automatic decompression system
  • Double walled heavy-duty tank with in tank fuel strainer
  • Battery cables not included
  • 50-state compliant engine

Key Specs

Manufacturer's Warranty3 year limited warranty
Ship Weight90.0 lbs
Engine Displacement (cc)389
Start TypeElectric w/recoil backup
ApplicationPressure washer, compressor
Engine TypeGX series OHV commercial-duty
Net Power Output (HP)11.7 (8.7 kW) at 3,600 RPM
Net Torque (lbs./ft.)19.5 (26.4 Nm) at 2,500 RPM
Shaft OutputHorizontal
Shaft Diameter (in.)1
Shaft Length (in.)3 31/64
Shaft Keyway (in.)1/4
Shaft End Tapped (Diameter (in.)/Threads per inch)7/16-20
Shaft Rotation (From PTO Shaft Side)Counterclockwise
PTO Height (in.)5 1/4
Cylinders (qty.)1
Cylinder BoreCast iron
Bore x Stroke (in.)3.5 x 2.5
Compression Ratio8.2:1
Cooling SystemAir cooled
Air Cleaner TypeDual element
Fuel TankStandard (White)
Fuel TypeGasoline
Fuel Tank Capacity (qt.)6.4
Fuel FilterFuel tank filler neck strainer
Oil Capacity (qt.)1.16
Lubrication SystemForced splash
Low Oil AlertYes
Low Oil ShutdownYes
Ignition SystemElectronic
Governor SystemCentrifugal mechanical
CarburetorFloat, external vent
Throttle ControlRemote (wire)
Choke ControlManual
Max. RPM3,600
Charging System Amps10
Muffler IncludedSilent, exhaust pipe protector, deflector
Auto Compression ReleaseYes
Bolt Circle (in.)5, 6 1/2
Mounting Base L x W (in.)7 11/16 x 3 25/64–4 1/16
Dimensions L x W x H (in.)15 7/8 x 17 11/16 x 17 3/8
EPA/CARB Approval (California Air Resource Board)Yes