The Kubota V2403 engine, a core member of Kubota’s renowned 03‑M Series, powers an extensive range of industrial and off‑road machinery. Celebrated for durability, fuel efficiency, and clean performance, this 4‑cylinder diesel engine has become a trusted choice in demanding environments.
Whether you’re planning a complete overhaul, tracking down reliable replacement parts, or simply checking the health of your equipment, this comprehensive guide provides everything you need to know about the Kubota V2403.
Kubota V2403 Engine Overview
- Type: Vertical, water‑cooled, 4‑cycle diesel
- Design Focus: Long‑term endurance, reliable power delivery, and compliance with modern emissions regulations
- Aspiration: Naturally aspirated
- Combustion System: Indirect Injection with Kubota’s advanced E‑TVCS (Three Vortex Combustion System) for cleaner, quieter combustion
Key Features:
- Robust power output with excellent fuel economy
- Low noise and vibration via a half‑float valve cover and MoS₂‑coated pistons
- Optional side PTO for hydraulic attachments
The V2403‑M engine combines traditional mechanical reliability with contemporary engineering to meet EPA/CARB Interim Tier 4 and EU Stage IIIA emission standards—a smart, environmentally responsible choice for industrial and agricultural applications.
Data Source: https://engine.kubota.com/products/detail?id=58&ln=en
Core Kubota V2403 Engine Specifications
| Specification | Value |
|---|---|
| Engine Model | Kubota V2403‑M‑E3B |
| Type | Vertical, Water‑Cooled, 4‑Cycle Diesel |
| Cylinders | 4 |
| Bore × Stroke | 87.0 mm × 102.4 mm (3.43 in × 4.031 in) |
| Displacement | 2.434 L (148.5 cu. in.) |
| Aspiration | Naturally Aspirated |
| Combustion System | Indirect Injection (E‑TVCS) |
| Horsepower (Gross) | 36.5 kW (48.9 HP) @ 2700 RPM |
| Maximum Torque | 158.6 Nm (117.0 lb‑ft) @ 1600 RPM |
| Fuel System | In‑Line Pump |
| Dimensions (L × W × H) | 646 × 495 × 684 mm (25.4 × 19.5 × 26.9 in) |
| Dry Weight | 184 kg (406 lbs) |
Note: Specs are based on the V2403‑M‑E3B model. Actual values can vary slightly depending on OEM configuration and application.
Kubota V2403 Torque Specifications
Correct torque application is crucial to ensure performance, safety, and engine longevity.
Over‑tightening can lead to component failure; under‑tightening may cause leaks or vibration. Always use a calibrated torque wrench and follow the manufacturer’s recommended tightening sequence.
Important Torque Points:
- Cylinder Head Bolts: Follow multi‑stage torque and angle‑tightening steps (e.g., +90° → +90°). Replace bolts at reassembly.
- Connecting Rod Bolts: Maintain precise torque to prevent bearing wear and ensure balanced crank rotation.
- Main Bearing Cap Bolts: Even torque secures the crankshaft and maintains engine stability.
- Flywheel Bolts: Proper tightening prevents vibration and potential shearing.
Pro Tip: Never “torque by feel.” Refer to the official Kubota service manual for the exact torque values and bolt reuse guidelines for your specific V2403 model.
Kubota V2403 Fuel System
The V2403 uses a robust in‑line injection pump, precisely engineered to pair with Kubota’s E‑TVCS combustion system. This design delivers:
- Pressurization: Generates the high fuel pressure needed for fine atomization
- Timing: Synchronizes injection with the combustion cycle for maximum efficiency
- Metering: Keeps fuel delivery consistent across all load conditions
Common Fuel System Issues:
- Hard starting or poor acceleration
- Power loss or uneven idling
- Excessive black or white exhaust smoke
When troubleshooting, prioritize inspecting fuel injectors, filters, and the injection pump for contamination or wear.
Common Applications of the Kubota V2403
Thanks to its flexible design and strong power‑to‑weight ratio, the V2403 is found in a variety of machines, such as:
- Skid Steers & Compact Track Loaders: e.g., Bobcat S185, S205
- Mini Excavators & Tractors
- Generators / Power Units
- Wood Chippers & Industrial Machinery
Note: Application examples are compiled from industry data and are not listed on the official Kubota engine product page.
Maintenance Essentials for V2403 Longevity
Regular maintenance safeguards your investment and ensures reliable operation:
- Cooling System: Inspect the water pump, thermostat, and radiator often. The V2403’s enhanced cooling passages between cylinders regulate temperature efficiently—keep them clean to prevent overheating.
- Fuel System: Use only clean, high‑quality diesel fuel. Replace the fuel filter on schedule to protect injectors and the pump.
- Air Filtration: A clean air filter safeguards the engine from abrasive particles. A clogged filter restricts airflow, reducing efficiency and power.
- Gaskets & Seals: Replace aging gaskets and seals during rebuilds with comprehensive overhaul kits to prevent leaks and downtime.
Frequently Asked Questions
Q1. How much horsepower does the Kubota V2403 produce?
Approximately 48.9 HP (36.5 kW) @ 2700 RPM, though output may vary by application.
Q2. Is the V2403 turbocharged?
No. The standard V2403‑M is naturally aspirated, valued for simplicity and robust reliability.
Q3. Which emissions standards does it meet?
It complies with EPA/CARB Interim Tier 4 and EU Stage IIIA regulations.
Q4. Can I rebuild a V2403 myself?
Yes — with the official service manual, correct torque data, and quality parts. Many professionals rely on FridayParts for overhaul kits and components.
Q5. What’s the engine displacement?
The V2403 displaces 2.434 liters (148.5 cu in).
A mechanic in blue overalls uses a wrench to service a Kubota V2403 engine removed and set on a pallet, preparing it for overhaul.
Your Trusted Partner for Kubota V2403 Engine Parts
Maintaining your Kubota V2403 with genuine, high‑quality parts is the best way to protect your equipment investment.
Knowing the specifications is just the start—the next step is sourcing trusted, durable components.
At FridayParts, we supply a complete range of Kubota V2403 parts engineered to meet or exceed OEM standards. Every item is designed for performance, compatibility, and long‑term reliability—minimizing downtime and keeping your machine running smoothly.
Example Parts Listing
Keep Your Kubota V2403 Running Like New
From preventive maintenance to complete overhauls, FridayParts offers the parts and expertise you need to keep your Kubota V2403 performing at its peak.
Explore the full Kubota engine parts today at FridayParts.com. If you want to know more about other Kubota engine specs, we also cover V2203, D1105, D902, and more.
