Honda GX390 QAE2 Horizontal 390cc Engine with Electric Start

★★★★★ 4.7 42 reviews

$641.99
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Product details

Management number 201912854 Release Date 2025/09/17 List Price $385.19 Model Number 201912854
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Not Available to Ship to California

With the GX390, you're looking at one of the best engines in the business. Powerful, reliable, durable and quiet. Honda's GX Series is power you can trust, and then some. Common applications include pressure washers, water pumps, agricultural equipment and more.

Digital CDI ignition system with variable timing

Increased compression ratio, Precision camshaft design offers precise valve timing and optimal valve overlap for better fuel efficency, and OHV design for increased efficiency and optimal power transfer

Precision engineered components result in lower vibration

Large capacity, multi-chamber exhaust system, Improved camshaft and muffler reduce overall engine noise by up to 5 dB

Simple throttle control, large fuel tanks, dual oil drains and fill, and easily accessible spark plug

Automatic mechanical de-compression system

ENGINE SPECIFICATIONS
ENGINE BRAND Honda
MODEL NUMBER GX390 QAE2
WARRANTY 3 Year Residential | 3 Year Commercial
POWER OUTPUT 11.7 HP @ 3600 RPM
TORQUE 19.5 lb-ft (26.5 Nm) @ 2500 rpm
CRANKSHAFT ORIENTATION Horizontal
CRANKSHAFT TYPE Straight
CRANKSHAFT DIAMETER 1"
CRANKSHAFT LENGTH 3-31/64"
END TAPPED SIZE 3/8-24UNF 2BTAP
KEYWAY 1/4"
ROTATION DIRECTION  Counter-Clockwise
STARTER TYPE  Electric & 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
FUEL  Unleaded 86 Octane or Higher
FUEL PUMP  N/A
GOVERNOR SYSTEM  Centrifugal Mass
CONTROLS  Manual Choke & Throttle
BORE x STROKE  88mm x 64mm
COMPRESSION RATIO  8.2 : 1
CHARGING SYSTEM  3 Amp w/ Rectifier
MUFFLER  Silent, Spark Arrester, Deflector
FLYWHEEL
ENGINE NOTES 
REPLACES GX390U1QAE2, GX390UTQAE2, GX390K1QAE2, GX390UT2QAE2, GX390UT1QAE2, GX390 QAE2

COMMON APPLICATIONS

*This engine is commonly used for, but not limited to, these applications*

Air Compressors, Lawn Sprayers, Log Splitters, Pressure Washers, Sand & Salt Spreaders, Sprayer Pumps, Vibratory Plows, Trenchers

COMMON EQUIPMENT MANUFACTURERS

*This engine is commonly used on, but not limited to, these equipment manufacturers/brands*

Brave, Champion, Quincy, Top Dresser, Vermeer


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4.7 out of 5
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42 ratings | 17 reviews
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