Download PDFDescription
The Beta Marine Engine – Beta 20 is a robust 3-cylinder diesel propulsion engine delivering 20 hp (14.9 kW) at 3,600 RPM. Known for its reliability, smooth operation, and compact design, it’s well-suited for sailboats in the 26–32 ft range, including Atomic 4 repowers.
Key Features
- 3-cylinder naturally aspirated Kubota-based engine.
- Displacement of 719 cc, bore 67 mm & stroke 68 mm.
- Heat exchanger cooling and high-inertia flywheel for quiet cruising.
- Indirect injection with gear-driven camshaft and three‑vortex combustion.
- Standard 40 A alternator, ABV instrument panel, flexible mounts, TMC 40 gearbox.
Duty Cycle & Usage
- Application: Small to mid-size marine propulsion
- Load Variations: Light to moderate
- Load Factor: 40%–80%
- Annual Use: Up to ~2,000 hours/year
- Installation Angles: ≤15° static / ≤25° when heeling
Technical Specifications: Beta 20 Marine Engine
| Power Output | 20 hp (14.9 kW) @ 3,600 RPM |
|---|---|
| Cylinders | 3 inline |
| Displacement | 719 cc |
| Bore & Stroke | 67 × 68 mm |
| Cooling System | Fresh/raw water heat exchanger |
| Fuel System | Indirect injection, mechanical governor |
| Alternator | 40 A @ 12 V |
| Transmission | TMC 40 mechanical gearbox (~2:1) |
| Dry Weight | ≈ 104–106 kg |
| Start System | 12 V electric start |
| Control Panel | ABV series 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 20 Marine Engine is especially suited for:
- Sailboats between 26–32 ft (Atomic 4 replacements)
- Classic wooden yachts and tenders
- Light displacement motorboats
- Repower and retrofit installations
kW 14.9
RPM 3600
Duty Light to moderate marine propulsion
Emissions RCD II compliant
