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The Beta 50 Marine Engine is a naturally aspirated 4‑cylinder diesel producing approximately 50 hp (37 kW) at 2,800 RPM. With a displacement of 2,197 cc and weighing around 249–260 kg, this powerful yet smooth engine is built for sailboats in the 38–42 ft range, offering reliable and quiet performance.
Key Features
- 4‑cylinder Kubota‑based naturally aspirated diesel.
- Displacement: 2,197 cc; bore 87 mm × stroke 92.4 mm.
- Heat exchanger cooling, wet-exhaust manifold, intake silencer.
- High-inertia flywheel, oil-change pump, standard shutdown solenoid.
- Standard 65 A serpentine-belt alternator (upgradeable to 100‑175 A).
- ABV instrument panel, flexible mounts & coupling included.
- Transmission options: TMC 60 gearbox (~2:1 reduction).
Duty Cycle & Usage
- Application: Mid-size marine propulsion
- Load Factor: 40%–80%
- Annual Use: Up to ~2,000 hours/year
- Installation Angles: ≤ 15° static / ≤ 25° when heeling
Technical Specifications: Beta 50 Marine Engine
| Power Output | 50 hp (~37 kW) @ 2,800 RPM |
|---|---|
| Cylinders | 4 inline |
| Displacement | 2,197 cc |
| Bore & Stroke | 87 × 92.4 mm |
| Cooling System | Fresh/raw water heat exchanger Wet exhaust manifold |
| Fuel System | Indirect injection, mechanical governor, fuel & oil filters |
| Alternator | 65 A @ 12 V serpentine belt (upgradeable) |
| Transmission | TMC 60 gearbox (~2:1) |
| Dry Weight | ≈ 249–260 kg |
| Start System | 12 V electric starter |
| Control Panel | ABV panel with tachometer, hour meter, alarms |
Operating Conditions
- Ambient Temp: ≤ 45 °C
- Fuel Type: EN 590 marine diesel
- Installation Angles: ≤ 15° static / ≤ 25° heeling
Applications
The Beta 50 Marine Engine is ideally suited for:
- Sailboats of 38–42 ft (≈10–12 tons displacement)
- Classic yachts, tenders, and light trawlers
- Retrofit and repower installations
kW ~37
RPM 2800
Duty Mid-size marine propulsion
Emissions RCD II compliant
