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The Beta Marine Engine – Beta 35 is a marinized, naturally aspirated 4‑cylinder diesel engine delivering 35 hp (24.7 kW) at 2,800 RPM. Built on the Kubota platform, it offers smooth, quiet cruising and is ideal for sailboats in the 37–39 ft range (≈9–10 tons).
Key Features
- 4‑cylinder, naturally aspirated Kubota-based engine.
- Displacement: 1,498 cc; bore & stroke 78 × 78.4 mm.
- Heat exchanger cooling, fresh/sea water pump, wet exhaust manifold.
- High-inertia flywheel, intake silencer, oil-change pump.
- Standard ABV control panel, flexible mounts & coupling.
- Serpentine‑belt drive alternator: 65 A standard (upgrade to 70 A available).
- Transmission: TMC 60 gearbox (~2:1 reduction).
Duty Cycle & Usage
- Application: 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 35 Marine Engine
| Power Output | 35 hp (24.7 kW) @ 2,800 RPM |
|---|---|
| Cylinders | 4 inline |
| Displacement | 1,498 cc |
| Bore & Stroke | 78 × 78.4 mm |
| Cooling System | Fresh/raw water heat exchanger, wet exhaust manifold |
| Fuel System | Indirect injection, mechanical governor, fuel lift & filters |
| Alternator | 65 A @ 12 V serpentine belt (upgradeable) |
| Transmission | TMC 60 (~2:1) |
| Dry Weight | ≈ 168–170 kg |
| Start System | 12 V electric starter |
| 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 35 Marine Engine is especially suited for:
- Sailboats 30–36 ft (≈9–10 tons displacement)
- Atomic 4 repower projects
- Classic yachts, tenders, light trawlers
- Medium-displacement retrofit installations
kW 24.7
RPM 2800
Duty Mid-size marine propulsion
Emissions RCD II, EPA Tier III (Recreational) compliant
