Honda GX390 commercial 389cc gas engine with recoil starter, 1.6-gallon fuel tank, and heavy-duty dual-element air filter.
Cutaway diagram of Honda GX390 showing OHV cylinder design, cast iron liner, dual filtration, and ball bearing crankshaft.
Dual oil drain plugs and 1-inch horizontal keyed output shaft on the Honda GX390 crankcase for versatile equipment mounting.
Forged tempered steel crankshaft supported by dual heavy-duty ball bearings to reduce engine vibration and internal wear.
Digital CDI ignition coil assembly providing optimized spark timing and easy engine starting on Honda GX390 motors.
Honda GX390 commercial 389cc gas engine with recoil starter, 1.6-gallon fuel tank, and heavy-duty dual-element air filter.
Cutaway diagram of Honda GX390 showing OHV cylinder design, cast iron liner, dual filtration, and ball bearing crankshaft.
Dual oil drain plugs and 1-inch horizontal keyed output shaft on the Honda GX390 crankcase for versatile equipment mounting.
Forged tempered steel crankshaft supported by dual heavy-duty ball bearings to reduce engine vibration and internal wear.
Digital CDI ignition coil assembly providing optimized spark timing and easy engine starting on Honda GX390 motors.
Honda

Honda Gas Engine GX390UT2XQC9 1 Inch Horizontal Shaft Motor (389cc 11.7 HP 3600 RPM Electric Start Commercial Pressure Washer Generator OEM)

Only 2 left
SKU: GX390UT2XQC9
$859.00 USD

Description

Honda GX390UT2XQC9 389cc 11.7 HP OHV Commercial Horizontal Shaft Engine

The Honda GX390UT2XQC9 commercial-grade horizontal shaft engine delivers 11.7 net horsepower and 19.5 lb-ft of torque at 2,500 RPM for heavy-duty industrial machinery and commercial power equipment. Engineered with a 389cc 4-stroke overhead valve (OHV) combustion architecture, this industrial motor features both a 12V key-switch electric starter and a recoil backup with mechanical automatic decompression. Outfitted with an integrated Oil Alert automatic shutdown sensor and a heavy-duty dual-element air filtration system, it safeguards internal components during continuous, high-load operation across pressure washers, commercial generators, concrete saws, and agricultural water pumps.

Best Used For:

  • Commercial Pressure Washers: Driving high-PSI triplex plunger pumps on mobile wash rigs and industrial surface cleaning equipment.
  • Jobsite Power Generation: Powering heavy-duty prime-power generators, air compressors, and hydraulic power units under continuous daily cycles.
  • Construction and Masonry Machinery: Repowering walk-behind concrete saws, compaction equipment, mortar mixers, and high-volume trash pumps.

Key Performance & Safety Features

  • Commercial OHV Engine Design: Optimized overhead valve cylinder head improves thermal efficiency, fuel economy, and smooth power delivery.
  • Electric Start with Recoil Backup: Delivers instant 12V turnkey electric ignition alongside an automatic decompression recoil starter.
  • Honda Oil Alert Protection: Prevents engine seizure by automatically grounding the ignition circuit if the oil drops below safe operating levels.
  • Cast Iron Cylinder Sleeve: High-density cast iron bore liner resists mechanical cylinder wear and extends service life under harsh conditions.
  • Dual Ball Bearing Crankshaft: Precision bearing-supported crankshaft minimizes internal friction, harmonic vibration, and axial runout.
  • Dual-Element Air Cleaner: Heavy-duty pleated paper and pre-filter foam shield the carburetor and cylinder against fine silica and abrasive debris.

What's Included

  • (1) Honda GX390UT2XQC9 389cc OHV Commercial Engine with Electric Start
  • (1) Pre-Installed 12V Electric Starter Motor and Solenoid
  • (1) Heavy-Duty Recoil Starter Assembly
  • (1) Spark Plug Wrench and Engine Owner's Manual

Technical Specifications

Brand Honda Engines
Model Number GX390UT2XQC9
Engine Displacement 389 cc (23.7 cu in)
Net Horsepower Output 11.7 HP (8.7 kW) @ 3,600 RPM
Net Torque Output 19.5 lb-ft (26.4 Nm) @ 2,500 RPM
Engine Type & Cycle 4-Stroke, Single Cylinder, Overhead Valve (OHV)
Shaft Orientation & Type Horizontal Keyed Output Shaft (1.0 Inch Diameter)
Starting System 12V Electric Start with Manual Recoil Backup
Crankcase Oil Capacity 1.16 US Quarts (1.10 L / 37.2 fl oz)
Fuel Tank Capacity 1.61 US Gallons (6.10 L)
Emissions Certification EPA and CARB Emissions Compliant (50-State Legal)
Dry Engine Weight 69.9 lbs (31.7 kg)

Pro-Tip: Before firing up your equipment on slopes or unlevel terrain, verify oil levels reach the upper limit of the dipstick to keep the Oil Alert sensor from tripping safety engine shutoffs.