Kubota V2403 Complete Diesel Engine | New Genuine Kubota

The Kubota V2403 is the 2.4 liter workhorse of Kubota’s 03 Series: a vertical, water cooled, 4-cycle, 4-cylinder diesel with a bore and stroke of 87.0 x 102.4 mm and 2.434 L (148.5 cu in) of displacement. Across the family, output spans roughly 48.9 to 65.2 HP, from naturally aspirated mechanical versions up to the turbocharged common rail V2403-CR-T-E4B rated 48.6 kW (65.2 HP) at 2700 RPM. Valley Fuel Injection & Turbo is an authorized Kubota dealer in Woodland, CA, and we supply new genuine Kubota V2403 complete engines through our Kubota engine sales, parts, and service program. Because “V2403” covers multiple factory configurations across several emissions tiers, we confirm the exact spec against your machine serial number and engine data plate before we quote, so the engine that arrives is a true match for your equipment and its emissions certification.

Application & Fitment

The V2403 family includes mechanical and electronic common rail versions built across multiple emissions tiers:

• V2403-M-E2B | Tier 2, mechanical indirect injection
• V2403-M-E3B | interim Tier 4 / EU Stage IIIA mechanical (Kubota Engine America config V2403-M-E3B-KEA-2, Kubota P/N 1J46600000)
• V2403-M-T-E3B | turbocharged mechanical (KEA config, Kubota P/N 1J40300000)
• V2403-M-DI-E2B, V2403-M-DI-E3B, V2403-M-DI-T-E3B | mechanical direct injection, including the Bobcat spec V2403TMDIR-BC
• V2403-CR-E4B and V2403-CR-T-E4B | electronic common rail, Tier 4 Final, with DOC or DOC plus DPF aftertreatment
• V2403-CR-T-E5 and V2403-CR-TE5-BG | EU Stage V industrial and generator versions
• BG genset variants in the 25.5 to 33.5 kW class

Confirmed equipment applications for the V2403 include:

• Bobcat skid steer and track loaders: S130, S150, S175, S185, S205, T140, T180, T190
• Bobcat excavators and loaders: 331, 334, 335, 337, 341, 430, 435, E50, E55
• Caterpillar machines powered by the Cat C2.4, which is the Kubota V2403 built for Cat: 304E, 304E2 CR, 305E2 CR, 305.5E and 305.5E2 CR, 306E2, and 307E2 CR mini excavators, plus 903C, 903C2, and 903D compact wheel loaders
• Kubota excavators: KX121-3, KX121-3SS, KX161-3, U45, U45S, U45ST, U45-3
• Kubota tractors and TLBs: M5100, M4800SU, M62
• Generator sets in the 25.5 to 33.5 kW class built on the BG variants
• Also used in Gehl 6635 skid steers, TCM SSL707 and SSL709, Scat Trak 1300D, Thomas skid steers, Toro Groundsmaster mowers, Princeton forklifts, and Jacobsen LF550 and LF570 mowers

One important caution: the Kubota KX057-4 and U55-4 excavators use the larger V2607-CR, not the V2403. If you are not certain which engine your machine carries, send us the machine model and serial number and we will verify it before anything ships.

Cross-Reference Part Numbers

• Cat C2.4 | the Caterpillar C2.4 is the Kubota V2403 built and labeled for Caterpillar equipment
• Kubota 1J46600000 = V2403-M-E3B-KEA-2 complete engine (Kubota Engine America)
• Kubota 1J40300000 = V2403-M-T-E3B-KEA-2 turbo complete engine (Kubota Engine America)
• Bobcat 6683201REM | Bobcat factory reman V2403 Tier 2 for Bobcat loaders, listed for reference
• Bobcat 6693422 | Bobcat OEM engine number commonly replaced with a V2403 long block, listed for reference

Frequently Asked Questions

How do I know which V2403 configuration my machine needs?

The V2403 was built in mechanical IDI, mechanical direct injection, and electronic common rail versions across Tier 2, interim Tier 4, Tier 4 Final, and EU Stage V. The right engine depends on your machine, its build year, and its original emissions certification. Give us the machine model and serial number plus the spec code from the engine data plate if you can read it, and we will confirm the exact configuration against Kubota’s records before quoting.

Is the Cat C2.4 really the same engine as the Kubota V2403?

Yes. The Cat C2.4 used in Caterpillar mini excavators such as the 304E2 CR, 305E2 CR, 305.5E2 CR, and 307E2 CR, and in 903 series compact wheel loaders, is a Kubota V2403 built and labeled for Caterpillar. Kubota’s own vendor spec sheets document the V2403-M-DI-E3B as the Cat C2.4. If your Cat machine needs an engine, we can help you match the correct Kubota configuration.

Do you support the fuel system on this engine too?

That is our specialty. Valley Fuel Injection has been a diesel injection shop since 1993, so beyond supplying the engine we test and service Kubota injection pumps and injectors in house through our diesel fuel injection services, and we handle the electronic V2403-CR versions through our common rail system repair department. One call covers the engine and the fuel system behind it.

Why Buy From Valley Fuel Injection & Turbo

• Authorized Kubota dealer with genuine Kubota complete engines, parts, and factory support
• Diesel fuel injection specialists since 1993, based in Woodland, CA
• Serial number verification on every engine order, so the configuration and emissions tier match your machine before it ships
• In-house pump, injector, and common rail expertise to support the engine for its whole service life

Call For Pricing

Call 530-668-0818 or contact us online. Please have your engine model, the spec code from the engine data plate if available, and your machine serial number ready. We will confirm the exact V2403 configuration for your equipment, then quote availability and current pricing.