Carroll Stream Phone1-888-208-2088


Honda GX390 Gas Engine Electric start 1" straight side shaft GX390UT2-QAE2, Replaced by GX390UT2X-QAE2

Price: $1,290.00
Sale Price: $914.00
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‎Free 1–5 day delivery
74.00 LBS

Prop. 65 Warning: This product contains chemicals known to the state of California to cause cancer and birth defects, or other reproductive harm.





Honda GX390UT2-QAE2 Small Gas Engine Electric & Recoil Pull Start

With 1" Diameter, 1/4" Keyway Shaft

** Our Rhino 13HP or 16HP Engine is an excellent replacement for a Honda GX390 and in-stock now! More than half the price and awesome quality too!
13hp Rhino Engine (Click here to check it out!)
16hp Rhino Engine (Click here to check it out!)

The highest quality guaranteed! We have been in business since 2005, and our engines are fully rebuildable with all parts available. The Honda GX390 engine replacement for GX390UT2-QAE2 or GX390UT2QAE2.

The Honda GX390 is the go-to engine for go karts, generators, pressure washers, and various industrial and commercial uses. These premium residential motors are fuel efficient, easy starting and smooth performance. This convenient, heavy duty and reliable 4-stroke engine does the job for many applications. Also, offering a 3-year limited warranty on these motors. Your order ships quickly with expert turnaround time in our fully stocked warehouse. Packaged with care, Carroll Stream Motor Company provides free shipping. This Honda engine is a 4-stroke OHC single cylinder, which is a 88 X 64 stroke. It is a 389cc, 11.7 HP and 3600 RPM.

This Honda small motor is built with quality components and is ready to outlast the competition. Purchase now to take advantage of our free shipping and quick turnaround time. Or, call if you have questions! 888-208-2088, 248-628-4638.

Purchase Opti Oil With Engine For 6 Year Warranty


Make Honda
Model GX 390
Type Small Engine
Fuel Gas Unleaded 86 Octane or Higher
Engine Type 4 Stroke OHV Single Cylinder
Bore/Stroke 88 X 64
Displacement 389 cc
Compression Ratio 8.2:1
Max Power 11.7 HP @ 3600 RPM
Max Torque 19.5 ft. lbs. @ 2500 RPM
Ignition Type Digital CDI with Variable Timing
Dimensions (L x W x H) 16 x 19.75 x 18 in.
Starting Type Electric Start and Recoil Pull Start
Fuel Tank Capacity 1.6 Gal.
Oil Capacity 1.16 Qt
Dry Engine Weight 74 lbs.
Shaft Type Keyed - Straight
Shaft Diameter 1" Diameter, 1/4" Keyway
Shaft Length 3-7/8" Total, 2-7/8" Usable
Shaft I.D. Thread Size 3/8"-24 Drilled and Tapped
Bolt Pattern 4 Bolt
Oil System Splash, Oil Alert
Reduction Type None
Engine Cooling Type Forced Air Cooling
PTO shaft Rotation Counterclockwise (from PTO shaft side
Governor System Centrifugal Mass Type
Air cleaner Dual Element
3-Year Limited Warranty
Fuel Efficient, High Output Operation
Heavy Duty Recoil Pull Start
Cast Iron Sleeve
Smooth Performance
Easy to Use and Maintain
Simple throttle control
Easy, convenient, heavy duty control box
Easily accessible spark plug
Easy Starting
Ergonomic, easy to grip recoil rope design
Automatic mechanical de-compression system
Emissions Compliant
Lower emissions, same power output!
CARB and EPA certified
No catalyst necessary
Precision camshaft design offers precise valve timing and optimal valve overlap for better fuel efficency
OHV design for increased efficiency and optimal power transfer
High compression ratio for better fuel efficiency
Precision engineered components result in lower vibration
Ball bearing supported crankshaft for greater stability
Exceptionally Quiet
Carburetor Butterfly
Large capacity, multi-chamber exhaust system
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
New carburetor chamber coating and carburetor filter help to protect against fuel impurities
Dual element air cleaner
Fuel Valve
Cross Reference Guide
Kohler: CH440
Briggs & Stratton: 245432-0235
User Manual

Use to Replace Model Numbers:

GX390U1QAE2, GX390UTQAE2, GX390K1QAE2, GX390UT2QAE2, GX390UT1QAE2, GX390 QAE2

Please call for questions about what engines this replaces. (888-208-2088, 248-628-4638)

Any cross-reference is provided as a courtesy. You will be responsible for making sure the part number we are providing will fit your application. If you are unsure, please contact us before purchasing for help. Please have your model and serial number available.

Summary of the Honda GX390UT2-QAE2

The Honda GX390UT2-QAE2 Small Gas Engine is a premier option for a diverse array of uses, such as go-karts, generators, pressure washers, and a variety of industrial and commercial purposes. Carroll Stream Motor Company, established in 2005, promises top-notch quality with engines that can be fully rebuilt and all components easily accessible. This high-end engine is renowned for its fuel efficiency, effortless starting, and seamless operation, providing dependability and ease for any job.

This high-performance engine is equipped with a 4-stroke, overhead cam (OHC), single-cylinder design. It boasts a displacement of 389cc, providing a formidable 11.7 horsepower at 3600 RPM. The engine's bore and stroke dimensions measure 88mm x 64mm, effectively maximizing its power and efficiency. With a 1" diameter shaft and a 1/4" keyway, it offers exceptional compatibility with various equipment, making it incredibly versatile and practical.

Honda's dedication to excellence and resilience is clearly demonstrated in the GX390UT2-QAE2. This remarkable engine is backed by a 3-year limited warranty, guaranteeing long-term performance and instilling confidence in its quality. At Carroll Stream Motor Company, we prioritize efficiency and meticulousness in processing your order, ensuring it is carefully packaged and swiftly shipped from our well-stocked warehouse. Moreover, we provide free shipping, making the acquisition of this exceptional engine even more convenient and cost-effective.