Baudouin 6M33.2 Heavy Displacement Marine Diesel Engine

Description

Harbor towing fleets rely on the Baudouin 6M33.2 Heavy Displacement Marine Diesel Engine for severe bollard pull reliability. Operating as an ocean towing tugboat propulsion engine, this long-stroke design satisfies IMO Tier II and EPA Marine Tier 3 emissions limits. Substantial engine height demands tall deckhead crane clearances, while wide structural bed brackets require reinforced stringer caps.

Individual four-valve cast iron heads give this Baudouin heavy displacement marine diesel extraordinary torsional rigidity under heavy towline loads. Wet sleeve liners inside the 19.6 liter inline six block allow rapid cylinder rebuilds, while crankcase side inspection doors access rod bearings in-frame. High-pressure common rail injection meters fuel cleanly across low idle speeds. The 24V isolated ground electrical system prevents hull electrolytic pitting. Dry bobtail weight lands at 2,390 kg (5,269 lbs).

Key Features of Baudouin 6M33.2

Requesting a verified Baudouin 6M33.2 repower quote assists shipyards in checking engine bearer centers and shaft line rake before torching out old foundations. Heavy cast mounting pads reduce low-frequency vibration.

• Long-stroke 150 x 185 mm (5.91 x 7.28 in) cylinder geometry creates 19.6 L (1,196 cu in) displacement.
• Delivers a continuous P1 commercial duty rating of 650 BHP (478 kW) at 1,800 RPM.
• Reaches maximum intermittent outputs of 750 BHP (551 kW) at 1,800 RPM for heavy dredging.
• A jacket-water charge-air aftercooler chills turbocharged air to maximize in-cylinder air mass.
• Standard SAE 1 flywheel housing connects cleanly to heavy duty Masson transmission pairing.
• Complies with IMO Tier II and EPA Marine Tier 3 commercial marine emissions limits.
• Deep base casting supports the 2,390 kg (5,269 lbs) bare dry mass on steel stringers.

Low Speed Torque and Fuel Rates

Long stroke geometry produces massive low-speed wheel torque, with the turbocharger establishing positive manifold pressure past 1,200 RPM to sustain continuous towline tension. Working this 750 hp commercial diesel at full intermittent load consumes approximately 36.8 GPH (139 LPH). Wet exhaust gas temperatures must stay below 1,022°F (550°C) to safeguard exhaust manifold valves. Ambient engine room temperatures above 122°F (50°C) trigger electronic fueling derates. Ensure generous intake air ventilation. Precise common rail timing prevents exhaust slobber during extended low-RPM idling, delivering heavy duty marine propulsion.

Daily Sump Access and Bilge Care

Tugboat machinery spaces present serious maintenance bottlenecks. Checking lube oil requires 400 mm (15.7 in) clearance above rocker covers to withdraw the dipstick cleanly. Crankcase breathers vent oily mist under prolonged heavy towing, requiring periodic hose clearing. Secondary fuel filter changes need drip trays to catch diesel spills. Sacrificial zinc anodes on heat exchanger heads require bi-monthly checks to halt copper-nickel tube corrosion. Anti-seize paste prevents seized pipe bolts.

• Inspect raw-water pump impellers seasonally for blade cracking.
• Evacuate the 65.0-liter oil pan using low-mounted manual drain valves.
• Maintain shaft coupling alignment within 0.05 mm across resilient mounts.

Factory Warranty and Crate Equipment

Moteurs Baudouin protects this propulsion unit with a 2-Year commercial limited warranty validated upon authorized sea-trial commissioning. Factory shipping crates contain the 24V isolated ground electrical harness, digital wheelhouse instrumentation display, flexible anti-vibration engine mounts, manual sump drain valve assembly, and complete shipyard technical overhaul service manuals.