Honda GX390

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Specifications

Model GX390 Category Name Engines Year 2025
Sale Type New Manufacturer Honda Fuel Unleaded 86 octane or higher
Carburetor Butterfly float type Dry Weight 31.5 kg (69 lbs) Net Torque 19.5 lb-ft (26.4 Nm) @ 2,500 rpm
Air Cleaner Dual element Engine Type Air-cooled 4-stroke OHC Displacement 389 cm3
Oil Capacity 1.1 litres (1.16 U.S. qts) Bore X Stroke 88 mm x 64 mm Governor System Centrifugal mass type
Ignition System Digital CDI with variable ignition timing Starting System Recoil/electric Compression Ratio 8.2:1
Net Power Output* 11.7 HP (8.7 kW) @ 3,600 rpm Fuel Tank Capacity 6.1 litres (6.4 U.S. qts) Lubrication System Splash
PTO Shaft Rotation Counterclockwise (from PTO shaft side) Lamp/Charge Coil Options 25W, 50W / 1A, 3A, 10A, 18A Price Contact for price CAD
Description

Horizontal Crankshaft

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.

Common Applications

  • Agricultural equipment
  • Commercial lawn and garden equipment
  • Construction/industrial equipment
  • Forestry equipment
  • Generators
  • Pressure washers
  • Small vehicles
  • Tillers/cultivators
  • Water pumps
FEATURES

FUEL-EFFICIENT,HIGH-OUTPUT OPERATION

  • Variable timing digital CDI ignition
  • Increased compression ratio
  • Precision camshaft design offers precise valve timing and optimal valve overlap for better fuel efficiency
  • OHV design for increased efficiency and optimal power transfer

SMOOTH PERFORMANCE

  • Precision-engineered components result in lower vibration
  • Ball bearing supported crankshaft for greater stability
  • Heavy duty balancer shaft
  • Improved piston design

EXCEPTIONALLY QUIET

  • Large capacity, multi-chamber exhaust system
  • Improved camshaft and muffler reduce overall engine noise by up to 5 dB
  • Reduced mechanical noise due to light weight, noise-reducing materials
  • Forged steel crankshaft and rigid crankcase
  • Helical cut gears
  • Sophisticated air intake system

PROVEN RELIABILITY

  • Oil alert
  • Cast iron cylinder sleeve
  • High-quality materials, fit, and finish
  • Dual element air cleaner
  • Fuel Valve
  • 3-Year Limited Warranty

EASY TO USE AND MAINTAIN

  • Simple throttle control
  • Large fuel tanks
  • Large automotive-type fuel cap
  • Dual oil drains and fill
  • Easy, convenient, heavy duty control box
  • Easily accessible spark plug

EASY STARTING

  • Heavy-duty recoil starter
  • Ergonomic, easy to grip recoil rope design
  • Automatic mechanical decompression system
  • Variable ignition timing

EMISSIONS COMPLIANT

  • CARB and EPA certified
  • No catalyst necessary

AVAILABLE OPTIONS

  • Low profile versions
  • Gear reduction options
  • Electric start
  • Spark arrester available
  • Charge and lamp coils with multiple output options available
  • Cyclone Air Cleaner available
DIMENSION DIAGRAM

PERFORMANCE CURVE

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