D2 75

D2 75

D2 75

Product catalog summary
Engine Overview: The D2-75 is a 2.2-liter, in-line 4-cylinder diesel engine with charge air cooling and freshwater cooling. It features a cam-driven, in-line injection pump and operates quietly with minimal vibrations at low cruising RPM. It complies with US EPA Tier 3 and EU RCD II emissions standards, making it suitable for lifeboat use with US Coast Guard approval.
Engine Block and Head: Constructed from high-grade cast iron, the engine block and head include a rigid tunnel block design. The crankshaft is made from chrome molybdenum and is both statically and dynamically balanced. Pistons are crafted from high silicon aluminum with heat treatment, featuring two cast iron, chromium-faced compression rings, and a single oil ring. Valve seats are replaceable and hardened, and the flywheel includes an elastic coupling.
Engine Mounting: The engine is mounted flexibly to reduce vibrations.
Lubrication System: Features a spin-on full-flow oil filter, separate oil scavenger pipe, closed circuit crankcase ventilation, and dual oil filling positions.
Fuel System: Includes a flange-mounted, cam-driven in-line injection, a feed pump with hand primer, a spin-on type fine fuel filter, and an auxiliary stop button.
Cooling System: Standard keel cooling with an optional 42V - 350W coolant water heater.
Electrical System: A 12V corrosion-protected system with a 115A marine alternator, optional 24V alternator, charging regulator with electronic sensor, glow plugs for cold starting, and a 2.0 kW electric starter motor.
Instruments: Includes a start/stop panel, tachometer with alarms, and an engine hour counter.
Optional Equipment: Offers a front-mounted spray pump kit, cooling water heater, certified cold start to minus 30 degrees, and a spring starter in combination with the electric starter.
Reverse Gear: The MS25L features a mechanical drop center with a straight output shaft and a ratio of 1:2.74.
Technical Specifications: The engine type is D2 with a duty rating of C12 for low-speed craft commercial use. It delivers 75 hp (55 kW) at 3000 RPM, with a displacement of 2.2 liters, a bore of 84 mm, and a stroke of 100 mm. The compression ratio is 23.3:1, and it has a maximum fuel consumption of 21 L/h. The dry weight with gear is 258 kg, and it uses a shaft drive propulsion system.
Performance Data: Graphs indicate fuel consumption, power output, and torque across various RPMs, showing efficient performance at calculated propeller load expectations.
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Catalog excerpts

D2 75-1

D2-75 is an in-line 4-cylinder; 2.2-liter; charge air cooled diesel engine using o camdriven, in-line injection pump, one/ freshwater cooling. With low cruising rpm, the engine runs quietly with minimal vibrations. Emission compliance US EPA Tier 3 / EU RCDII - This design allowed the engines to pass and obtain the US Coast Guard approval for use as lifeboat engines. ENGINE BLOCK AND HEAD • Cylinder block and cylinder head manufactured from high grade cast iron. Crankcase features a rigid tunnel block design • Chrome molybdenum forged crankshaft, statically and dynamically balanced with integral counterweights. pistions are cast from high silicon aluminum, are heat treated and fitted with two cast iron, chromium faced compression rings and a single oil ring • Replaceable, hardened valve seats • Elastic coupling on flywheel ENGINE MOUNTING • Flexible engine mounting LUBRICATION SYSTEM • Spin-on fulflow oil filter • Separate oil scavenger pipe • Closed circuit crankcase ventilation • One top and one side oil filling position FUEL SYSTEM • Flange mounted, cam driven in-line injection • Feed pump with hand primer • Spin-on type fine fuel filter • Auxiliary stop button on engine ELECTRICAL SYSTEM • 12V corrosion-protected electrical system • Charging regulator with electronic sensor for voltage drop compensation • Glow plugs for excellent cold starting • Electric starter motor(2.0 kW output) • Electric stop INSTRUMENTS • Start/stop panel • Tachometer with alarms and engine hour counter OPTIONAL EQUIPMENT • Front mounted spraypump kit • Cooling water heater (42 V - 350W) • Certified cold start to minus 30 degrees • Springstarter in combination with electric starter REVERSE GEAR • MS25L - Mechanical drop center with streight output shaft - Ratio 1:2,74 COOLING SYSTEM • Keel cooling (Standard) • Coolant water heater 42 V - 350 W (Option)

 Open the catalog to page 1
D2 75-2

D2-75 BUKH SOLAS MARINE DIESEL ENGINE D2-75 Specifications Engine type Engine duty rating Crankshaft power [hp(kW)] Rpm@full load Compression ratio Emission compliance Electronic engine diagnostic Crankshaft power Calculated propeller load exp. 3.0 Dry weight with gear [kg] Power Crankshaft power Propulsion system Shaft Drive Calculated propeller load exp. 3.0 70 70 As BUKH is always endeavouring to improve the engines, specifications mentioned are subject 90 60 to alterations without previous notice. 60 Crankshaft power Calculated propeller load exp. 3.0 SOLAS approved by Det Norske Veritas...

 Open the catalog to page 2

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