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The Beta Marine Engine – Beta 90T is a turbocharged 4‑cylinder diesel engine delivering approximately 90 hp (67.1 kW) at 2,600 RPM. With a displacement of 3,620 cc and weighing around 425 kg, this engine is designed for larger sailboats in the 50–55 ft range, offering reliable and efficient performance.
Key Features
- 4‑cylinder turbocharged Kubota-based diesel engine.
- Displacement: 3,620 cc; bore & stroke: 98 × 120 mm.
- Heat exchanger cooling system with header tank and water-cooled exhaust manifold.
- Mechanical fuel lift pump, fuel and oil filtration systems.
- Flywheel housing and drive plate with heavy inertia ring for smooth operation at low RPM.
- Special quiet air intake filter.
- Standard 70 A 12 V alternator (upgradeable options available).
- ABV control panel with tachometer, hour meter, alarms, and 3m interconnection cable.
- Heavy-duty engine feet and flexible mountings.
- Transmission options: TM93A, PRM280, PRM500, ZF45A, AF69IV, with reduction ratios from 2:1 to 2.94:1.
Technical Specifications: Beta 90T Marine Engine
| Power Output | 90 hp (67.1 kW) @ 2,600 RPM |
|---|---|
| Cylinders | 4 inline |
| Displacement | 3,620 cc |
| Bore & Stroke | 98 × 120 mm |
| Cooling System | Heat exchanger with header tank and water-cooled exhaust manifold |
| Fuel System | Mechanical fuel lift pump, fuel and oil filtration |
| Alternator | 70 A 12 V (upgradeable options available) |
| Transmission | TM93A standard; PRM280, PRM500, ZF45A, AF69IV options available |
| Dry Weight | ≈ 425 kg (937 lb) |
| Start System | 12 V electric starter |
| Control Panel | ABV with tachometer, hour meter, alarms, and 3m interconnection cable |
Operating Conditions
- Ambient Temp: Up to 45 °C
- Fuel Type: EN 590 marine diesel
- Installation Angles: ≤ 15° static / ≤ 25° heeling
Applications
The Beta 90T Marine Engine is ideally suited for:
- Sailboats 50–55 ft (≈20–25 tons displacement)
- Classic yachts, tenders, and cruising vessels
- Repower and retrofit installations in large keelboats
kW 67.1
RPM 2600
Duty Large sailboat propulsion
Emissions RCD II compliant
