The Volvo Penta D2-55 is a 4-cylinder fresh water-cooled engine, compact, quiet and environmentally efficient diesel. The D2-55 series meets BSO, EU RCD Stage II, US. EPA Tier 3 emissions.

Volvo Penta D2-55 genuine service parts are made to exacting standards to withstand the harsh saltwater environment in which marine diesel engines operate. The D2-55 is available with a straight or angled gearbox or a 130S Saildrive.

Technical description:

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. Pistons 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

- Tuned front and rear cushion-type rubber mounts. Adjustable.

Lubrication system

- Spin-on full flow 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 pump

- Feed pump with hand primer

- Spin-on type fine fuel filter

- Auxiliary stop button on engine

Exhaust system

- Freshwater cooled exhaust manifold and seawater cooled exhaust elbow

Cooling system

- Freshwater cooling system governed by thermostat

- Tubular heat exchanger with integral expansion tank

- Easily accessible sea water pump and impeller

Electrical system

- 12V corrosion-protected electrical system

- 115A marine alternator

- 24V alternator as option

- Charging regulator with electronic sensor for voltage drop compensation

- Glow plugs for excellent cold starting

- Electric starter motor (2.0 kW output)

- Electrical stop

- Extension cable harness with plug-in connection available in various lengths

EVC instruments

- Start/stop panel

- Tachometer with alarms and engine hour counter Options:

- Separate instruments for: – Fuel level – Temperature – Voltage

- LCD display with multi sensor

- NMEA interface presenting engine data on chart plotters

Choice of transmissions:

HS25A Hydraulic – drop center with 8° down angled output shaft. Trolling valve kit available.

Ratio 2,3:1/2,3:1 (RH/LH) and 2,71:1/2,71:1 (RH/LH).

MS25A Mechanical – drop center with 8° down angled output shaft.

Ratio 2.23:1/2.74:1 (RH/LH) and 2.74:1/2.74:1 (RH/LH).

MS25L Mechanical – drop center with straight output shaft.

Ratio 2.27:1/2.10:1 (RH/LH) and 2.74:1/2.72:1 (RH/LH).

S-drive 130S and 130SR for reverse installation of engine. Ratio 2.19:1.