Description:

GX390 QA2 Honda Horizontal Electric Start OHV Engine

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

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!

Engine Specifications

Dimensions

• Weight: 78.0 lb

Power

• Power Output: 11.7 HP @ 3600 RPM
• Torque: 19.5 lb-ft (26.5 Nm) @ 2500 rpm

Crankshaft

• Orientation: Horizontal
• Type: Straight
• Diameter: 1"
• Length: 3-31/64"
• Dimensions: 1" x 3-31/64"
• End Tapped Size: 3/8-24UNF 2BTAP
• Keyway: 1/4"
• Rotation Direction: Counter-Clockwise

Other Engine Specifications

• Starter Type: Recoil
• Ignition System: Digital CDI with Variable Ignition Timing
• Carburetor: Butterfly Float
• Number of Cylinders: One
• Cylinder Bore: Cast Iron Sleeve
• Air Cleaner: Dual Element
• Oil Capacity: 1.16 qt
• Low Oil Alert: Yes
• Fuel: Unleaded 86 Octane or Higher
• Fuel Tank Capacity: 6.4 qt
• Fuel Pump: N/A
• Governor System: Centrifugal Mass
• Controls: Manual Choke, Manual/Remote (Rod) Throttle
• Bore x Stroke: 88mm x 64mm
• Compression Ratio: 8.2 : 1
• Charging System: N/A
• Muffler: Silent, Spark Arrester, Deflector

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