Standard Horizontal Honda GX390-QA2 Engine, 11.7 net HP

GX390-QA2 is an OHV horizontal shaft lightweight engine.  Overhead Valve design offers cooler, fuel-efficient operation and cast iron cylinder sleeve provides longer service life.

Common uses include: powering air compressors, cement mixers, water pumps, pressure washers, and medium sized construction equipment.

View: GX390 Owner’s Manual

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!

Product Specifications:

• Engine Type: Air-Cooled, 4-Stroke OHV
• Bore Stroke: 3.5″ X 2.5″
• Displacement: 389 cm3
• Net Power Output: 11.7 HP @ 3600 RPM
• Net Torque: 19.5 @ 2500 RPM
• Crankshaft Diameter: 1″
• Crankshaft Length: 3-31/64″
• Crankshaft End Tapped Size: 7/16-20
• Crankshaft Keyway Width: 1/4″
• Oil Capacity: 1.16 quarts
• Fuel Tank Capacity: 6.4 quarts
• PTO Shaft Rotation: Counterclockwise
• Compression Ratio: 8.2:1
  
• Carburetor: Float
• Max RPM: 3600
• Starting System: Recoil
• Lubrication System: Splash
• Governor System: Centrifugal Mass Type
• Air Cleaner: Dual Element
• Muffler: Included
• Warranty: 3 Year Limited Manufacturer’s Warranty
• Shipping Weight: 82 lbs

Alternate Product Numbers: 

• GX390UT2QA2

• GX390QA2