Baudouin 12M26.3 High-Power V12 Marine Diesel Engine
Description
Slow transit times between offshore platforms drain valuable crew boat charter revenue. The Baudouin 12M26.3 Marine Diesel Engine produces 1,650 BHP intermittent power to drive passenger ferries and fast crew vessels at high cruising speeds. High-pressure common rail fuel architecture demands strict 2-micron fuel filtration, requiring primary centrifuge separators to prevent abrasive injector nozzle scoring.
High-strength cast iron forms the monolithic 90-degree V12 engine crankcase and individual four-valve cylinder heads. Replaceable wet sleeve cast iron liners seat inside precision-bored cylinder decks. Electrical systems use 24V isolated ground wiring paired with an 8.0 kW starter and 70A marine alternator. Dry engine weight measures 7,088 lbs, occupying engine room mounting dimensions of 92.8in length, 55.1in width, and 55.5in height with an SAE 0 flywheel housing.
Key Features of Baudouin 12M26.3
Commercial vessel shipyards buy Baudouin 12M26.3 propulsion units to achieve high sprint speeds without sacrificing commercial repower budgets. Direct marine pricing allows commercial vessel operators to meet EPA Marine Tier 3 emissions standards while maintaining high horsepower density.
- High-Pressure Common Rail injection atomizes diesel fuel at 23,200 PSI to maximize thermal efficiency.
- Intermittent P3 rating outputs 1,650 BHP at 2,300 RPM for fast crew transfer runs.
- Water-cooled charge air intercoolers drop intake air temperatures to boost combustion density.
- Cupronickel tube heat exchanger resists seawater corrosion during continuous harbor operation.
- Electronic engine control unit modulates multiple injection events per stroke to reduce smoke.
- Wet sleeve cylinder liners permit complete cylinder overhauls without removing the engine block.
- Standard SAE 0 housing bolts directly to heavy ZF, Masson Marine, or Twin Disc gearboxes.
Common Rail Dyno Output Verifications
Full-load water brake dynamometer testing confirms 1,650 BHP at 2,300 RPM with fuel burn reaching 0.355 lbs per horsepower hour at wide open throttle. Crankshaft journal runout measures 0.0003in TIR across main journals. Common rail rail pressure holds stable at 23,200 PSI during rapid acceleration sweeps. Exhaust gas temperatures level off at 980°F before entering the turbocharger turbine housings. Sound pressure levels register 96 dB at 3ft distance inside insulated engine compartments under maximum sprint power.
Vessel Maintenance Common Rail Protocols
The electronic diagnostic display connects via standard J1939 CAN-bus protocols, providing real-time rail pressure and cylinder misfire telemetry. Do not install this high-power electronic marine engine in unventilated engine holds lacking secondary raw water cooling scoops or clean fuel polishing centrifuges.
- Drain primary water separator bowls and replace 2-micron fuel filter elements every 250 hours.
- Change the 30.4-gallon lube oil sump and spin-on oil filters every 500 operating hours.
- Inspect the cupronickel heat exchanger zinc sacrificial anodes for corrosion every 90 days.
Commercial Marine Warranty Skid Manifest
Baudouin protects this propulsion unit with a verified 2-Year commercial limited marine warranty covering factory parts and labor. The factory shipping skid contains the complete Baudouin 12M26.3 engine, 24V 8.0 kW starter, 70A alternator, SAE 0 flywheel housing, remote digital instrument display, and owner operations manual.
Baudouin 12M26.3 Specs
| Manufacturer / Brand | Moteurs Baudouin |
| Model Designation | 12M26.3 |
| Engine Type | 4-Stroke Heavy-Duty Commercial Marine Diesel |
| Cylinder Configuration | 90° V12 Cylinder |
| Total Displacement | 31.8 Liters (1,940 cu in) |
| Bore x Stroke | 150 x 150 mm (5.91 x 5.91 in) |
| Aspiration & Charge Air | Turbocharged with Water-Cooled Charge Air Intercooler |
| Cooling System Architecture | Cupronickel Tube Heat Exchanger (Keel Cooling or Skin Tank Available) |
| Continuous Power Rating (P1) | 1,200 BHP (883 kW) @ 1,800 RPM |
| Maximum / Intermittent Power (P3/P4) | 1,650 BHP (1,214 kW) @ 2,300 RPM |
| Fuel Injection Platform | High-Pressure Common Rail (HPCR) Electronic Fuel Injection |
| Cylinder Head Metallurgy | Individual 4-Valve High-Strength Cast Iron Cylinder Heads |
| Cylinder Liners | Replaceable Wet Sleeve Cast Iron Liners |
| Flywheel Housing & Flywheel | SAE 0 Flywheel Housing with SAE 18 Flywheel |
| Electrical System & Ground | 24V Isolated Ground Marine Electrical System |
| Starter & Alternator Output | 24V 8.0 kW Electric Starter / 24V 70A Marine Alternator |
| Lube Oil Sump Capacity | 115 Liters (30.4 US gal) Commercial Sump |
| Engine Coolant Capacity | 125 Liters (33.0 US gal) |
| Dry Weight (excl. gearbox) | 3,215 kg (7,088 lbs) |
| Overall Dimensions (L x W x H) | 2,356 x 1,400 x 1,410 mm (92.8 x 55.1 x 55.5 in) |
| Emissions Certification | IMO Tier II, EPA Marine Tier 3, CCNR II Compliant |
| Fuel Compatibility | Ultra-Low Sulfur Diesel (ULSD No. 2), Marine Gas Oil (MGO DMA/DMB) |
| Transmission / Outdrive Compatibility | Engine Package - Compatible with ZF, Masson Marine, and Twin Disc Transmissions |
| Factory Warranty Period | 2-Year Commercial Limited Marine Warranty |
| Application Research | Commercial offshore supply vessels (OSV), crew boats, fishing vessels, high-speed passenger ferries, patrol craft, workboats, and heavy-duty repower projects |















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