| Manufacturer / Brand | Volvo Penta |
| Model Designation | D2-75 Bobtail |
| Engine Type | 4-Stroke Turbocharged Charge-Air Cooled Marine Diesel |
| Cylinder Configuration | Inline-4 |
| Total Displacement | 2.2 Liters (132 cu in) |
| Bore x Stroke | 84.0 x 90.0 mm (3.31 x 3.54 in) |
| Aspiration & Charge Air | Turbocharged with Charge Air Cooler (Intercooler) and Acoustic Intake Silencer |
| Cooling System Architecture | Tubular Heat Exchanger Closed Circuit with Raw Seawater Impeller Pump |
| Continuous Power Rating (P1) | 69.0 BHP (50.7 kW) @ 2,800 RPM |
| Maximum / Intermittent Power (P3/P4) | 75.0 BHP (55.0 kW) @ 3,000 RPM |
| Fuel Injection Platform | Mechanical Cam-Driven In-Line Unit Injection Pumps with Mechanical All-Speed Governor |
| Cylinder Head Metallurgy | Monobloc Cast Iron Cylinder Block with Cast Iron Overhead Valve (OHV) Cylinder Head |
| Cylinder Liners | Cast Iron Engine Block with Integrated Parent Bores |
| Flywheel Housing & Flywheel | Dedicated Volvo Penta Marine Bellhousing with Flexible Torsional Marine Damper Plate |
| Electrical System & Ground | 12V Negative Ground Marine Electrical System |
| Starter & Alternator Output | 12V 2.0 kW Electric Starter / 12V 115A Marine Alternator with Charging Sensor |
| Lube Oil Sump Capacity | 6.5 Liters (1.72 US gal) |
| Engine Coolant Capacity | 7.0 Liters (1.85 US gal) |
| Dry Weight (excl. gearbox) | 230 kg (507 lbs) |
| Overall Dimensions (L x W x H) | 720 x 544 x 610 mm (28.3 x 21.4 x 24.0 in) |
| Emissions Certification | RCD 2 (Directive 2013/53/EU) / EPA Tier 3 Marine / BSO II |
| Fuel Compatibility | Ultra-Low Sulfur Diesel (ULSD No. 2), Automotive Diesel (EN 590), B7 Biodiesel |
| Transmission / Outdrive Compatibility | Bare Engine Bobtail - Compatible with Volvo Penta MS25A / MS25L, HS25A, and ZF (ZF 25 / ZF 25A) Marine Transmissions |
| Factory Warranty Period | Volvo Penta 2-Year Limited Warranty plus Additional 3-Year Major Component Protection |
| Application Research | Cruising sailing yachts (40-50 ft), steel displacement motor cruisers, Dutch barges, passenger river ferries, and commercial fishing skiffs. |
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