MAN yacht engines are well known for their compact dimensions and thus give architects and boat-builders a good deal of room for manoeuvre. The V12-1650 merges well into the array of space-saving engines and features convincingly compact dimensions of 1,667 x 1,150 x 1,350 mm (length x width x height). MAN’s engineers have achieved this by, among other things, using a weight- and space-saving SAE1 flywheel housing. One advantage for installation of the engine at the boat-builders is the exhaust system, which has one central outlet. The water pump is driven by a gear instead of a V-belt, which considerably reduces the maintenance effort. Beside this all parts requiring servicing, such as fuel and oil filters, are so efficiently positioned in the V12-1650 that they are easily accessible from the centre gangway.
Power and classification
With the V12-1650 MAN Engines & Components is extending its range of classifiable engines in the upper rating range for light-duty applications. Classification of engines and other components is a pre-requisite for use in charter yachts and requires special constructional modifications on the engine such as leak-proof injection lines and double filters.
MAN’s engine range for yachts and pleasurecraft
For yachts and pleasurecraft in the 50 to 100-foot classes MAN offers powerful, compact diesel engines with ratings from 730 hp (537 kW) to 1,800 hp (1,324 kW). A characteristic feature of all MAN engines is their powerful acceleration coupled with an extremely low fuel consumption. The advantages of the V engines in the rating range from 900 hp (662 kW) to 1,800 hp (1,324 kW) are to be found above all in their outstanding power efficiency and compactness. The engines are delivered ready for installation and designed for optimum performance in the various conditions of deployment and operation. After installation MAN offers to examine and pass off the engine and to carry out extensive commissioning. The Gold Standard certificate for this inspection gives the boat owner an additional warranty. All engines meet the valid international exhaust-gas regulations.
Characteristics
Cylinders and arrangement
12 cylinders in 90° V arrangement
Operation mode
4-stroke diesel engine, watercooled
Turbocharging
2-stage turbocharger with charge air intercooler and waste gate
Number of valves
4 valves per cylinder
Fuel system
Common Rail direct fuel injection with electronic control
Engine lubrication
Closed system with forced feeding, oil cooling and filtering
Type of cooling
Plate heat exchanger, seawater cooled
Engine control
Electronic injection control (EDC) Electronic engine monitoring including diagnostic unit
Yacht Engines manufactured by Man Engines are suitable for application to expensive yachts and sport fishing boats because of its features such as minimal fuel consumption for cost efficient performance yet providing users with a compact and high-speed diesel drives from 537 kW to 1,324 kW. In addition, the range of outputs by the engines lengths from 537 kW to 1,324 kW (730 HP to 1,800 HP) and includes all the recent generation V8 and V12 engines as well as the stable six-cylinder engine. Furthermore, with the Man Yacht engines, a neat yet silent and dependable propulsive power is performed
Characteristics
Cylinders and arrangement
8 cylinders in 90° V arrangement
Operation mode
4-stroke diesel engine, watercooled
Turbocharging
Turbocharger with charge air intercooler and waste gate
Number of valves
4 valves per cylinder
Fuel system
Common Rail direct fuel injection with electronic control
Engine lubrication
Closed system with forced feeding, oil cooling and filtering
Type of cooling
Plate heat exchanger, seawater cooled
Engine control
Electronic injection control (EDC) Electronic engine monitoring including diagnostic unit
Modern common rail injection system with up to 1,800 bar
MAN Engines is set to present its latest generation of six-cylinder engines at the Fort Lauderdale Boat Show in Florida, USA. These engines are designed to be used in yachts and trawlers up to 55 feet, as well as in sport fishing boats. The basic six-cylinder engine has been tried and tested many hundreds of thousands of times in a wide range of on- and off-road machinery since it was first introduced in 2007. Modified especially for the use in pleasure craft, the two six-cylinder inline engines, the 537 kW (730 hp) i6-730 and the 588 kW (800 hp) i6-800, each with a cylinder capacity of 12.4 l, are currently available for light duty operations.
The future-proof i6-800 and i6-730 yacht engines, which are based on the D2676 model, also have a modern common rail system offering up to 1,800 bar for high mean pressures and optimized combustion. This enables MAN engineers to achieve lower vibrations and noise emissions along with reduced fuel consumption. To ensure compliance with strict emissions legislation, MAN shares information and data on a regular basis with institutions including the US Environmental Protection Agency (EPA) and the International Maritime Organization (IMO).
The new yacht engines also offer the broad torque plateau that is characteristic for MAN marine engines. The 537 kW (730 hp) i6-730 provides 2,450 Nm of torque, while the high-performance 588 kW (800 hp) i6-800 version manages to generate 2,700 Nm at between 1,200 and 2,100 rpm. This provides maximum torque over a broad engine speed range at the lowest specific fuel consumption, achieving consistent acceleration and a fast and efficient planing.
MAN’s design engineers came up with an optional design cover for the six-cylinder engine, ensuring to fulfil the criteria of elegance and high performance. The sophisticated and timeless design of the perfectly shaped engine stays within the style of modern luxury yachts. “The engine has always been the source of the power and dynamics which naval architects have expressed in their work. The wheel has now come full circle with a MAN yacht engine that is a state of art itself”, explains Claus Benzler, Head of Marine at MAN Engines.
For naval architects the new six-cylinder inline engines come in MAN’s typically compact 1,800 x 922 x 1,103 mm (L x W x H) design and have an even more streamlined oil pan design. With a dry weight of 1,200 kg, the new generation of engines also has an improved power to weight ratio.
The two new MAN marine diesel engines i6-800 and i6-730 based on the D2676 are set to replace the predecessor models R6-800 and R6-730 based on the D2876 in the medium term, and will be available from December 2015 on.
Characteristics
Cylinders and arrangement
6 cylinders in-line
Operation mode
4-stroke diesel engine, watercooled
Turbocharging
Turbocharger with charge air intercooler and waste gate
Number of valves
4 valves per cylinder
Fuel system
Common Rail direct fuel injection with electronic control
Engine lubrication
Closed system with forced feeding, oil cooling and filtering
Type of cooling
Heat exchanger with engine and seawater circuit
Engine control
Electronic injection control (EDC)
Fuel
DIN EN 590
Technical features i6-730 and i6-800
TYPE DESIGNATION
i6-730
i6-800
Displacement I
12.42
12.42
Maximum output to DIN ISO 3046-1 kW (hp)
537 (730)
588 (800)
Rated speed rpm
2,300
2,300
Maximum torque Nm
2,450
2,450
at speed rpm
1,300 – 2,100
1,400 – 2,000
Absolute fuel consumption at rated power 1) l/h
142
142
Classifiable
✔
–
Exhaust gas status
IMO Tier II, EPA Tier 3 RCD 2013/53/EC, RCD 94/25/EC
IMO Tier II, EPA Tier 3 RCD 2013/53/EC, RCD 94/25/EC
Dimensions i6-730 and i6-800
TYPE DESIGNATION
i6-730
i6-800
A-Overall width mm
986
986
B-Overall width mm
1,795
1,795
C-Overall width mm
1,096
1,096
D-Top of engine to crankshaft center mm
674
674
E-Length to engine from front end to edge of flywheel housing mm
1,527
1,527
Average weight of engine ready for installation (dry) kg
