This Honda Horizontal OHV Engine has a net power output of 11.7 HP @ 3,600 RPM.
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Honda Horizontal OHV Engine, 389cc, GX Series, 1in. x 3 31/64in. Shaft, Model# GX390UT1QAA2

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$19.99 Same DayStore Pickup:
2 in stock at Fredericksburg VA - Pickup in under 1 hr
- Model GX390UT1QAA2; 389cc, 11.7 HP air-cooled 4-stroke commercial-grade engine with 1in. dia. x 3 31/64in. L horizontal shaft
- OHV overhead valve design for increased efficiency and optimal power transfer
- Electronic ignition system with automatic decompression and heavy-duty recoil starter for quick and easy starts
- 5in., 6 1/2in. bolt circle; Mounting base: 7 11/16in.L x 3 25/64in. to 4 1/16in.W (approx.)
- Cast iron cylinder for exceptional durability
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Description
Key Specs
Reviews
Q & A
Accessories
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Product Summary
What's Included
- (1) Honda Horizontal OHV Engine, Model# GX390UT1QAA2
Features + Benefits

- Model GX390UT1QAA2; 389cc, 11.7 HP air-cooled 4-stroke commercial-grade engine with 1in. dia. x 3 31/64in. L horizontal shaft
- OHV overhead valve design for increased efficiency and optimal power transfer
- Electronic ignition system with automatic decompression and heavy-duty recoil starter for quick and easy starts
- 5in., 6 1/2in. bolt circle; Mounting base: 7 11/16in.L x 3 25/64in. to 4 1/16in.W (approx.)
- Cast iron cylinder for exceptional durability
- Preferred engine for construction equipment including pressure washers, compressors, log splitters and chipper/shredders
- Heavy-duty ball bearing supported crankshaft for greater stability
- Large double walled heavy-duty tank with in tank fuel strainer
- Large, easy to fill automotive-style fuel cap
- Auto idle/throttle control for extended engine life, improved fuel economy and reduced engine noise
- Precision camshaft for better fuel economy with precise valve timing and optimal valve overlap
- Low noise level thanks to a large capacity, multi-chambered exhaust system
- Improved camshaft and muffler reduce engine noise by up to 5dB
- Oil Alert protects engine
- Dual element air filter
- Easy to use throttle control
- Dual oil drains and fills for quick oil changes
- Easily accessible spark plug
- Not for sale in CA
Key Specs
| Attribute | Specification |
|---|---|
item# | 6066 |
Brand | Honda Engines |
Manufacturer's Warranty | 3 year limited warranty |
Ship Weight | 77.4 LB |
Engine Displacement | 389 cc |
Engine Type | GX Series OHV Commercial-duty |
Shaft Diameter | 1 in |
Shaft Length | 3.48 in |
Start Type | Recoil |
Shaft Keyway | 0.25 in |
Net Torque | 19.5 ft-lbs. |
Crankshaft | Q-type |
PTO Height | 5.25 in |
Cylinders (qty.) | 1 |
Cylinder Bore | Cast Iron |
Net Power Output | 11.7 HP |
Compression Ratio | 8.2:1 |
Fuel Tank | Yes |
| Attribute | Specification |
|---|---|
Fuel Tank Capacity | 6.4 qt |
Oil Capacity | 1.16 qt |
Low Oil Shutdown | Yes |
Low Oil Alert | Yes |
Shaft Rotation (From PTO Shaft Side) | Counter Clockwise |
Governor System | Centrifugal Mechanical |
Ignition System | Electronic |
Carburetor | Float, External Vent |
Lubrication System | Splash |
Auto Compression Release | Yes |
Cooling System | Air |
Bore | 3.5 in |
Stroke | 2.5 in |
Air Cleaner Type | Dual Element |
Choke Control | Manual |
Throttle Control | Remote |
Fuel Filter | Yes |
Muffler Included | Yes |
Reviews
Questions & Answers
Questions
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· 11 years ago
about what hp is this engine
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ProductExpert23· 11 years ago
Helpful?
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HondaSpecialist· 11 years ago
Net power output is 11.7 HP @ 3,600 rpm, and net torque is 19.5 lb-ft @ 2,500 rpm -Robert@Honda
Helpful?
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· 15 years ago
Can I install a muffler on a Honda 390cc Motor?
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Mfritch· 10 years ago
The motor comes with a muffler that will meet the state and federal standards.
Helpful?
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ProductExpert25· 15 years ago
This Honda engine already has a muffler.
Helpful?
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· 16 years ago
Is this Engine a good choice to use on a snowblower application and can this engine be converted over to electric strart ?
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ProductExpert6· 3 years ago
This engine could be used in a snow blower, providing that the shaft dimensions, overall dimensions and mounting base are similar to the engine that it is replacing. We do not offer a kit that would convert this engine to electric start. Our item # 6013 would come with electric start and has the same specifications.
Helpful?
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Mfritch· 10 years ago
If you're repowering a snow blower, you need to get all the specifications for the current motor and then contact the technical staff to help you find the appropriate model. You would not want to convert this to an electric start. There are nearly identical models that come with electric start and that is the better way to go. Choose before you purchase. It is no big deal if your blower currently has electric start. If it doesn't you will need to consider how you will mount a battery to your machine.
Helpful?
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· 2 months ago
What is the difference between the QNE2 and QAA2 engine?
1 answer-
ProductExpert6· 2 months ago
The QNE2 would have electric start. The QAA2 has an electronic ignition with recoil start.
Helpful?
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· 9 months ago
What Horse Power is this?
1 answer-
ProductExpert13· 9 months ago
This is rated at 11.7 horsepower.
Helpful?
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· a year ago
what is the max rpm of the engine
1 answer-
ProductExpert6· a year ago
The engine would be rated at a maximum of 3600 RPM.
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Anonymous· a year ago
Does this have the same bolt pattern as a GX 340 11 hp motor that I am trying to replace.
1 answer-
ProductExpert6· a year ago
This engine would have work with a 5 inch or a 6.5 inch bolt circle, You will need to measure the bolt circle on your engine to see if the match.
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· 2 years ago
What decibel rating does this engine have?
1 answer-
ProductExpert6· 2 years ago
A decibel rating is not given on the engines. There are too many variables to be considered, such as the application it is being used in.
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· 2 years ago
can you convert to tri fuel
1 answer-
ProductExpert11· 2 years ago
A conversion kit is not available for this engine.
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· 2 years ago
What size bolt goes in the output shaft ?
1 answer-
ProductExpert6· 2 years ago
The engine would have a 3/8"- 24 UNF tapped end on the shaft end.
Helpful?
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Accessories We Recommend
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Warranty
Manufacturer's Warranty
3 year limited warranty
Extend Your Warranty Coverage with a Northern Protection Plan (NPP)
Repair Plan — 1 Year
A Northern Protection Plan is available after adding the product to your shopping cart.
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Specifications
389 cc
212 cc
270 cc
389 cc
GX Series OHV Commercial-duty
OHV
GX Series OHV Commercial-duty
GX Series OHV Commercial-duty
1 in
3/4 in
1 in
1 in
3.48 in
2.43 in
3.23 in
3.48 in
Recoil
Recoil
Recoil
Electric and Recoil
0.25 in
0.18 in
-
0.25 in
19.5 ft-lbs.
-
14.1 ft-lbs.
19.5 ft-lbs.
Q-type
-
R-type
Q-type
5.25 in
-
5.25 in
5.25 in
1
1
1
1
Cast Iron
-
Cast Iron
Cast Iron
11.7 HP
6 HP
8.5 HP
11.7 HP
8.2:1
-
8.5:1
8.0:1
Yes
-
No
No
6.4 qt
3.8 qt
-
-
1.16 qt
0.63 qt
1.16 qt
1.16 qt
Yes
-
-
Yes
Yes
Yes
Yes
Yes
Counter Clockwise
Counter Clockwise
Counter Clockwise
Counter Clockwise
Centrifugal Mechanical
Mechanical Centrifugal
Centrifugal Mechanical
Centrifugal Mechanical
Electronic
CDI
Electronic
Electronic
Float, External Vent
Horizontal Type, Butterfly Valve
Float, External Vent
Float, External Vent
Splash
Splash
Splash
Splash
Yes
-
Yes
Yes
Air
Air
Air
Air
3.5 in
2.75 in
3 in
3.5 in
2.5 in
2.16 in
2.3 in
2.5 in
Dual Element
Dual Element
Dual Element
Dual Element
Manual
-
Manual
Manual
Remote
-
Remote
Remote
Yes
-
-
-
Yes
Yes
Yes
Yes
-
No
-
-
-
38.6000 lb
-
-
-
17.0 x 14.0 x 15.0 in
-
-
-
-
Ball
Ball
-
-
-
18
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