Honda GXV390UT1-DEXT Small Gas Engine

389cc Electric and Recoil Start

With 1" Diameter, 1/4" Keyway

Yes, in-stock.

The Honda GXV390UT1-DEXT is a 389cc vertical shaft engine built with Honda’s reputation for power, efficiency, and reliability. Superseding the GXV390T1-DETA, this updated model is engineered to meet the demanding needs of commercial, residential, and industrial applications.

Featuring both electric and recoil start options, the GXV390UT1-DEXT provides versatility and dependable performance in all conditions. Its 1-inch diameter vertical shaft with 1/4-inch keyway and 3-5/32” length makes it a perfect fit for a wide variety of equipment, including lawn mowers, pressure washers, tillers, water pumps, generators, and log splitters.

The GXV390UT1-DEXT is powered by Honda’s 4-stroke OHV single-cylinder design, which maximizes efficiency, reduces fuel consumption, and ensures lower emissions. A pressure and splash oil lubrication system keeps internal parts well protected, while Honda’s forced-air cooling system maintains consistent temperatures during prolonged use.

For durability and ease of use, this engine includes a transistorized magneto ignition system for reliable starts, a centrifugal mechanical governor for steady RPM control, and a dual-element air cleaner to protect against dirt and debris. These features ensure that the engine delivers steady, long-term performance, even in tough environments like landscaping sites or construction zones.

Delivering 10.2 HP at 3600 RPM with a compression ratio of 7.7:1, the GXV390UT1-DEXT offers strong, fuel-efficient power while staying compliant with strict emission standards. Compact dimensions of 17” x 15” x 16” and a weight of just 74 lbs make this engine easy to install and integrate into existing setups. Its counterclockwise PTO shaft rotation and four-bolt mounting system ensure secure installation and reliable operation.

As with all Honda engines, the GXV390UT1-DEXT is backed by a 3-year limited warranty for both residential and commercial use, giving you confidence in its long-term dependability. Fully rebuildable with parts readily available, this engine is a smart investment for professionals and equipment owners alike.

At Carroll Stream Motor Company, we’ve been supplying high-quality engines since 2005. Our Michigan-based team is here to help you confirm compatibility and answer technical questions. We offer fast, free shipping and expert customer support to make your purchase hassle-free.

Order the Honda GXV390UT1-DEXT today and experience the upgraded replacement for the GXV390T1-DETA—delivering the same Honda reliability with modern enhancements. For assistance, call us at 1-888-208-2088 to speak with one of our engine specialists.