Honda GX390QA2 Horizontal Engine

Sale price$921.45



GX390 QA2 Honda Horizontal Electric Start OHV Engine - FREE SHIPPING

Honda GX390 QA2 (GX390UT2QA2) horizontal OHV engine is 390cc and puts out 11.7 net HP. This Honda GX has a 1" x 3-31/64" crankshaft. The engine has a recoil starter, a silent muffler with a spark arrestor and deflector plus an oil alert system. Honda GX390 commercial engines deliver economical and quiet operation without sacrificing superior performance and reliable power. Common applications for this engine include water pumps, small vehicles, commercial lawn and garden equipment, generators and more.

Features Include:

  • 390cc, net 11.7HP
  • 1" X 3 31/64" crankshaft, 1/4" keyway, tapped 3/8 - 24
  • Recoil Start
  • Silent muffler with spark arrestor & deflector
  • Oil alert
  • 49-State CARB compliant


Warranty36 Months Private Residential; 36 Months Commercial,Rental,InstitutionalDisplacement Range241cc - 390ccEngine BrandHondaCrankshaft Diameter1"Crankshaft Length3-31/64"Crankshaft End Tapped Size3/8-24Crankshaft Keyway Width1/4"Air Cleaner TypeDual ElementThrottle ControlManual, Remote (Rod)Starter TypeRecoilPTO Height5-1/4Max RPM3600Oil CoolerNoCarburetor TypeFloatValve StyleOHVRecoil Starter Position9:00 O'ClockDisplacement389ccIgnition SystemDigital CDI with Variable TimingLubrication SystemSplashOil Capacity38MufflerYesFuel SystemGasolineGovernor SystemCentrifugal Mass TypeGear ReductionNoCharging SystemNoneChoke ControlManualCooling SystemAirTypeSmall EnginesFuel PumpNoAuxiliary PTONoCompression ReleaseYesMFG Rated Output11.7 Net HPCPSC CompliantNoLow Oil ShutdownYesLow Oil Alert/ShutdownNoCompression Ratio8.2:1Extended Recoil RopeNoOil FilterNoBolt Circle (in.)5,6-1/2Crankshaft TypeStraightOil PumpNoFuel FilterYesControl BoxNoCylinders (quantity)1Cylinder Bore TypeCast IronBore x Stroke88 x 64 mmCrankshaft StyleHorizontalFor Use in CaliforniaNoCrankshaft Rotation Direction (from PTO Shaft Side)CounterclockwiseFuel Tank Capacity6.4ColorRed

Product Features:

  • Fuel efficient, high output operation – precision camshaft design offers precise valve timing, optimal valve overlap, and better fuel efficiency
  • Smooth performance – ball bearing supported crankshaft for increased stability and lower vibration
  • Exceptionally quiet – multi chamber exhaust; improved camshaft and muffler reduce overall engine noise by up to 5 dB
  • Proven reliability – dual element air cleaner, cast iron cylinder sleeve, oil alert
  • Emissions compliant – CARB and EPA certified
  • 3 year limited manufacturer’s warranty included!

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