Product Description
Honda GX390UT2XQNR2 NH1 - 11.7 HP 389cc Horizontal Shaft Engine 1″ x 3-31/64″ (Color Black)
The Honda GX390UT2XQNR2 NH1 is a commercial-grade 389cc horizontal shaft engine rated at 11.7 horsepower. Built on Honda’s proven GX390 OHV platform, this engine is engineered for construction, rental, agricultural, and industrial equipment requiring strong torque output and dependable operation.
The NH1 designation identifies the factory black finish. This configuration features a 1″ diameter keyed crankshaft measuring 3-31/64″ in usable length with a tapped end, making it ideal for generators, pressure washers, pumps, compactors, and heavy-duty horizontal shaft applications.
Technical Specifications
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Brand: Honda
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Model: GX390UT2XQNR2 NH1
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Engine Series: GX390 Commercial Series
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Color Code: NH1 Black
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Engine Type: 4-Cycle, Air-Cooled, OHV Single Cylinder
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Displacement: 389cc
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Gross Horsepower: 11.7 HP
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Bore x Stroke: 88 mm x 64 mm
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Compression Ratio: 8.2:1
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Starting System: Recoil
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Shaft Orientation: Horizontal
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Crankshaft Diameter: 1″
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Crankshaft Length: 3-31/64″
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Keyway Size: 1/4″
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Thread Size: 3/8-24 UNF
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Lubrication System: Splash Lubrication
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Oil Capacity: 1.16 qt
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Ignition System: Transistorized Magneto
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Fuel Type: Gasoline
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Cooling System: Air-Cooled
Key Features
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11.7 HP Commercial Output – Built for demanding industrial applications
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389cc GX390 OHV Platform – Strong torque and efficient combustion
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NH1 Factory Black Finish – OEM color configuration
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1″ x 3-31/64″ Keyed Crankshaft – Standard horizontal PTO configuration
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3/8-24 UNF Tapped End – Secure mounting for pulleys and couplers
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Cast Iron Cylinder Sleeve – Extended engine durability
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Ball Bearing Supported Crankshaft – Greater stability under load
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Forged Steel Crankshaft – Increased strength in high-demand use
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Dual Element Air Cleaner – Improved protection in dusty environments
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Automatic Mechanical Decompression – Easier recoil starting
Warranty
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Manufacturer: Honda
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Commercial Warranty: 3-Year Limited
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Consumer / Residential Warranty: 3-Year Limited
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Coverage Subject To: Honda factory warranty terms, proper installation and maintenance
***NO RETURNS OR EXCHANGES ON ENGINES. ALL ENGINE SALES ARE FINAL.
ALL ENGINES ARE BRAND NEW WITH FULL FACTORY WARRANTY.***