VOLVO PENTA AQUAMATIC DUOPROP
4-cylinder, 4-stroke, direct-injected turbocharged marine diesel engine with aftercooler and Duoprop drive. 96110 kW (130150 hp)*
* Crankshaft power according to ISO 8665

AD31/DP

Reliable marine engine
AD31L/P is a reliable and economic marine engine with considerable power resources, developed for planing craft. With its compact dimensions, it is excellent for twin installation.

Direct injection

Direct injection (DI) results in a low thermal load and low fuel consumption compared with swirl chamber engines (IDI) with the same cylinder capacity.

Turbocharging

The engine is turbocharged with an exhaust-driven turbocompressor. More air can be forced into the cylinder in this way with the result that more fuel can be injected and the engine runs more efciently. Since combustion takes place in a turbo engine with excess air, the exhaust gases are cleaner than in a naturally-aspirated engine The turbo also acts as an additional silencer both on the induction side and on the exhaust side.
AD31L/P with DP-E Duoprop drive

Aftercooler

The air heats up and expands when it is compressed. In other words, it takes up more space. The aftercooler cools the compressed and heated air and raises its oxygen content so that the engine can use the fuel more efciently. with single propeller systems. The drive features standard power steering for maximum driving comfort.
adjustable rubber mounts in front of the engine and rubber suspension between ywheel housing and transom shield
Comprehensive service network
Volvo Penta has a well-established network of authorized service dealers in more than 100 countries throughout the world. These service centers offer Genuine Volvo Penta Parts as well as skilled personnel to ensure that you enjoy the best possible service.

Lubrication system

Pressure lubrication system with easily replaced full-ow oil lter on the side of the engine Tubular oil cooler that can be cleaned
Low exhaust emission levels
The direct injection, turbocharging and aftercooler contribute to minimizing noxious exhaust emissions and enhancing overall enjoyment of boating. The engine is certied according to SAV.

Fuel system

Rotor-type injection pump with a mechanical governor for accurate speed control Smoke limiter Fine lter with water separator Feed pump with hand primer Electrically operated stopping device

Technical description:

Engine and block
Cylinder block and cylinder head made of cast iron for good corrosion resistance and long service life Oil-cooled pistons with two compression rings and one oil scraper ring Replaceable wet cylinder liners Replaceable valve seats Five-bearing crankshaft
Air inlet and exhaust system
Inlet system designed to produce optimal air rotation which provides perfect combustion. This results in high power and low fuel consumption Air inlet silencer with replaceable lter Closed crankcase vent system Seawater-cooled exhaust elbow of cast iron with a stainless steel insert Complete connection for exhaust outlet through the drive Exhaust-driven freshwater-cooled turbocharger

DP drive

The DP drive with its twin counter-rotating propellers produces a harmonious drive unit with unbeatable characteristics in the boat in terms of speed, acceleration and fuel economy. It also produces less noise and vibrations, better steering and maneuvering characteristics, better grip in the water and a shorter time to planing compared

Engine mounting

Flexible mounting which provides sound and vibration insulation. The engine has two

Cooling system

Thermostatically regulated freshwater cooling Tubular heat exchanger with separate transparent expansion tank Gear-driven seawater pump with rubber impeller Coolant system prepared for hot water outlet Seawater strainer

Instrument panel:

Separate instruments and harness or complete panel tted with: Key switch Voltmeter Temperature gauge Rev counter Instrument lighting Hour meter Alarm for temperatu- Oil pressure gauge re, oil pressure and Alarm test charging

Accessories

An extensive range of accessories for: Fuel system Cooling system Control system Steering system Instruments Electric system Comfort & Safety Propeller & Drive Maintenance For detailed information, please see Accessory catalogues.

Electrical system

12V corrosion-protected electrical system, complete with instrumentation 14V/60A marine alternator Charging regulator with battery sensor for voltage drop compensation The alternator is prepared for a bulkheadmounted double-diode set which automatically distributes the charge current to two separate battery circuits Automatic fuse with manual reset Starter motor power 3.0 kW Extension cable harness with plug-in connection available in various lengths
Complete with transom shield, ywheel cover and installation components The drive can be tilted up by 42 Protective zinc anodes prevent corrosion The coolant water inlet at the front of the drive provides a reliable coolant water supply to the engine Built-in kick-up function to reduce possible damage, in the event the drive strikes an underwater object
Contact your local Volvo Penta dealer for further information. Not all models, standard equipment and accessories are available in all countries. All specications are subject to change without notice. The engine illustrated may not be entirely identical to production standard engines.

Power Trim

Power Trim is an electrically operated hydraulic system for trimming the drive angle while in use. The actual trim angle is indicated with ve LEDs and a digital display on the CD Trim instrument An analog instrument is also available

Technical Data

Engine designation.. Crankshaft power, kW (hp).. Propeller shaft power, kW (hp). Engine speed, rpm... Displacement, l (in3).. Number of cylinders.. Bore/stroke, mm (in.).. Compression ratio... Volvo Penta Duoprop drive. Ratio... Dry weight with DP, incl. prop., kg (lb). Duty rating..
Technical data according to ISO 8665. Fuel with a lower caloric value of 42,700 kJ/kg and density of 840 g/liter at 15C (60F). Merchant fuel may differ from this specication which will inuence engine power output and fuel consumption. N.B. The product can also be used in an application with a higher rating than stated, e.g. R3 can be used for R4 or R5. The engine is certied according to SAV.
AD31P 110 (150) 104 (141) 3900 2.4 (146) 4 92/90 (3.62/3.54) 17.5:1 DP-E 2.3:(977) R5R4
AD31L 96 (130) 90 (122) 3800 2.4 (146) 4 92/90 (3.62/3.54) 17.5:1 DP-E 2.3:(977) R5R3

Dimensions

Not for installation

AB Volvo Penta

SE-Gteborg, Sweden

www.volvopenta.com

09-AB Volvo Penta.