Kubota D902-E4B Complete New Diesel Engine (Tier 4 Final)

This is a brand-new, genuine Kubota D902 industrial diesel engine, supplied complete through Valley Fuel Injection & Turbo, an authorized Kubota dealer in Woodland, California. The D902 is the highest-output engine in Kubota’s Super Mini Series: a 0.898 L, three-cylinder, water-cooled diesel that delivers up to 24.8 HP in the same footprint as the smaller D722. It is the factory powerplant behind the Kubota RTV-X900 utility vehicle, BX-series sub-compact tractors, and ZD diesel zero-turn mowers, and the current E4B generation meets EPA/CARB Tier 4 and EU Stage V with no DPF and no electronic aftertreatment to maintain.

Application & Fitment

Supplied as the current-production D902-E4B, the Tier 4 Final generation of the D902. Confirmed applications for the D902 engine family include:

• Kubota RTV-X900 utility vehicles (RTV-X900G, RTV-X900R, RTV-X900W) and the earlier RTV900 series
• Kubota BX-series sub-compact tractors: BX1880, BX2380, BX23S, BX24, BX2360, BX2370
• Kubota ZD-series zero-turn diesel mowers: ZD1021, ZD323
• Kubota KX41-3 mini excavator, and reportedly the KX018-4
• Grasshopper 722D front-mount diesel mower
• Mini excavators, generator sets, and other compact equipment built on the D902

Some earlier machines listed above left the factory with previous D902 emission generations; the E4B is the current new-engine version and Kubota designed it to carry over the D902’s performance and physical characteristics. Kubota also builds this engine in multiple factory spec configurations (governed speed, flywheel housing, electrics), so call with your equipment model and the spec and serial numbers from your engine plate and we will confirm the exact build before you order.

Cross-Reference Part Numbers

• Kubota 1J965-00000 | D902-E4B-KEA-1 stock spec, 21.6 HP (16.1 kW) at 3200 rpm
• Kubota 1J094-00000 | D902-E4B-KEA-2 high-speed spec, 24.8 HP (18.5 kW) at 3600 rpm
• Kubota D902-E4B-PBS-1 | generator OEM spec with 1800 rpm genset rating

Engine Specifications

• Type: vertical, water-cooled, 4-cycle indirect injection (IDI) diesel with Kubota E-TVCS combustion
• Cylinders: 3 | Displacement: 0.898 L (54.80 cu in)
• Bore and stroke: 72.0 mm x 73.6 mm | Compression ratio: 24:1
• Rated output: up to 18.5 kW (24.8 HP) at 3600 rpm, SAE J1995 gross
• Maximum torque: 56.1 Nm (41.4 lb-ft) at 2600 rpm
• Fuel system: mechanical in-line injection pump, naturally aspirated
• Emissions: EPA/CARB Tier 4 and EU Stage V certified, no DPF or aftertreatment required
• Dry weight: approx. 72 kg (159 lb)
• Warranty: Kubota 2-year / 2,000-hour limited warranty on new engines

Frequently Asked Questions

Will this engine fit my RTV-X900, BX tractor, or ZD mower?

The D902 family powers all of those machines, but Kubota builds it in several factory spec configurations that differ in governed speed, flywheel, mounting, and electrical fittings. Give us your machine model plus the spec and serial numbers from the engine plate and we will confirm the correct configuration for a proper drop-in fit, including machines that originally shipped with an earlier D902 emission generation.

Why buy a genuine Kubota engine instead of aftermarket or used?

A new genuine engine arrives at factory tolerances with current Tier 4 Final emissions certification and Kubota’s 2-year / 2,000-hour limited warranty, honored through the authorized dealer network. A used or off-brand engine carries none of that protection, and on a machine you depend on daily the difference shows up the first time something goes wrong.

How do I order this engine?

Call 530-668-0818 or send us a quote request. Have your equipment make and model, engine spec number, and engine serial number ready. We will verify the correct D902 configuration, quote current pricing, and give you a realistic lead time.

Why source your Kubota engine from Valley Fuel Injection

Valley Fuel Injection & Turbo has specialized in diesel fuel injection since 1993 and is an authorized Kubota dealer for engine sales, parts, and service. We are not a drop-ship listing site: the same shop that supplies your engine also runs full diesel fuel-injection services, so we can support the engine long after it is in your machine. Diesel is all we do, and we have done it across Northern California and Nevada for over 30 years.

Pricing & availability: this genuine Kubota D902 engine is supplied to order. Call 530-668-0818 or request a quote for current pricing, availability, and lead time. Have your engine model, spec number, and serial number ready so we can confirm the exact configuration for your machine.