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  • 11.7 NET HP Honda Engine, 389 cc, 1" Crankshaft, Keyed & Tapped, w/ Oil Alert & Electric Start (3 amp coil) (GX390QAE)

11.7 NET HP Honda Engine, 389 cc, 1" Crankshaft, Keyed & Tapped, w/ Oil Alert & Electric Start (3 amp coil) (GX390QAE)

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Current Stock: 44


The GX Series has proven itself as one of the most rugged, easy-starting and reliable engines around. Trades people stake their livelihood on them day after day. Experience loads of power, impressive durability and exceptional fuel consumption with the GX390 - a great engine choice for water pumps, pressure washers, small vehicles and more.

  • Horizontal crankshaft
  • Digital CDI ignition system with variable timing
  • Precision camshaft design for precise valve timing and optimal valve overlap
  • Ball-bearing supported crankshaft for improved stability
  • Dual oil drains and fill
  • Multiple charging coil options
  • Common Applications:
    • Agricultural equipment
    • Commercial lawn and garden equipment
    • Construction/industrial equipment
    • Forestry equipment
    • Generators
    • Pressure washers
    • Small vehicles
    • Water pumps
    • Tillers/cultivators



Engine Type

Air-cooled 4-stroke OHV

Bore x Stroke

88 mm x 64 mm


389 cc

Net Power Output*

11.7 HP (8.7 kW) @ 3,600 rpm

Net Torque

19.5 lb-ft (26.4 Nm) @ 2,500 rpm
PTO TypeStraight

PTO Shaft Rotation

Counterclockwise (from PTO shaft side)
PTO Diameter/Taper1"
PTO Bolt Size3/8-24 UNF
Centrifugal ClutchNo

Compression Ratio


Fuel Tank Capacity

6.1 litres (6.4 US qts)

Lamp/Charge coil options

25W, 50W / 1A, 3A, 10A, 18A


Butterfly float type
Electric StarterYes
Recoil StarterYes
Remote ThrottleNo
Lever ThrottleYes
Oil Alert (Shutdown)Yes
Control Box c/w Ign.SwitchYes (Red or Black)

Ignition System

Digital CDI with variable ignition timing

Starting System


Lubrication System


Governor System

Centrifugal mass type

Air Cleaner

Dual element
Air Filter TypeDual
Exhaust DeflectorYes
Charge Coil3A
Regulator / RectifierStandard

Oil Capacity

1.1 litres (1.16 US qts)


Unleaded 86 octane or higher

Dry Weight

31.5 kg (69 lbs)

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