Description
Universal Kubota 5424 Marine Diesel Engine
The Universal Kubota 5424 Marine Diesel Engine is a compact and dependable inboard marine diesel engine engineered to deliver reliable propulsion for sailboats and small to medium vessels. Built on Kubota’s proven industrial diesel platform and adapted for marine use by Universal, the 5424 is known for its durability, fuel efficiency, and smooth performance in a wide range of operating conditions.
Engine Design & Construction
The 5424 features a 3-cylinder, 4-stroke diesel configuration with direct fuel injection, providing consistent power output and strong low-end torque for marine propulsion. Its robust construction and high-quality components are designed to withstand continuous operation in harsh marine environments, ensuring long service life and dependable performance.
A freshwater cooling system with heat exchanger protects internal engine components from saltwater corrosion and maintains optimal operating temperatures. The compact engine layout allows easy installation in limited engine compartments while preserving good access for routine maintenance.
Performance & Efficiency
Delivering approximately 24 horsepower, the Universal Kubota 5424 offers smooth and efficient power ideal for cruising, docking, and auxiliary sailing operations. The engine is optimized for low fuel consumption, making it an economical choice for extended cruising and everyday marine use.
Its well-balanced design reduces vibration and noise, contributing to improved onboard comfort during long voyages.
Marine Integration
Designed specifically for inboard marine applications, the Universal Kubota 5424 is compatible with marine gearboxes and conventional shaft drive systems. Its flexible installation options make it suitable for a variety of hull designs, including sailboats and small yachts.
Ease of Maintenance & Reliability
The Universal Kubota 5424 is valued for its simple, service-friendly design. Routine service points such as oil and fuel filters, belts, and cooling system components are easily accessible, helping reduce maintenance time and costs. Based on Kubota’s globally supported diesel platform, spare parts availability remains strong, ensuring long-term serviceability.
Ideal Applications
The Universal Kubota 5424 Marine Diesel Engine is ideal for:
Sailboats and auxiliary propulsion systems
Small cruising yachts
Coastal and inland waterway vessels
Boat owners seeking a reliable, low-maintenance diesel engine
Key Advantages
Proven Kubota diesel reliability adapted for marine use
Compact and space-efficient design
Fuel-efficient 3-cylinder direct injection engine
Freshwater cooling with heat exchanger
Smooth, low-vibration operation
Easy maintenance and strong parts availability
Technical Specifications
General
Model: Universal Kubota 5424
Engine Type: 4-stroke, vertical, water-cooled marine diesel
Fuel System: Direct fuel injection
Aspiration: Naturally aspirated
Number of Cylinders: 3 (inline)
Base Engine: Kubota industrial diesel (marine adapted)
Displacement & Combustion
Displacement: Approx. 1.12 L
Bore × Stroke: Approx. 76 mm × 73.6 mm
Combustion Chamber: Direct injection diesel
Performance
Rated Power: 24 HP (17.9 kW)
Rated Speed: 3,000 RPM
Maximum Torque: Approx. 63 Nm @ mid-range RPM
Operating Range: Optimized for low to mid RPM marine operation
Fuel Consumption: Economical, dependent on load and propeller match
Cooling & Lubrication
Cooling System: Freshwater cooling with heat exchanger
Lubrication System: Forced lubrication with gear-type oil pump
Engine Oil Capacity: Approx. 4.5 liters
Recommended Oil Type: Marine-grade diesel engine oil
Electrical System
Starting System: 12 V electric start
Starter Motor Output: Approx. 1.2–1.4 kW
Alternator: 12 V marine alternator
Battery Charging: Standard onboard charging capability
Dimensions & Weight
Overall Dimensions (L × W × H):
Approx. 720 × 500 × 600 mmDry Weight: Approx. 160–170 kg (engine only, excluding gearbox)
Drive & Installation
Rotation (Crankshaft): Counter-clockwise (viewed from flywheel end)
Drive Type: Inboard marine shaft drive
Compatible Gearbox: Marine transmission compatible with small inboard engines
Mounting: Flexible engine mounts for vibration reduction
Service & Adjustment
Valve Clearance (Cold):
Intake: ~0.20 mm
Exhaust: ~0.20 mm
Firing Order: 1 – 2 – 3
Maintenance Access: Easy access to filters, belts, and service points
