D7 Marine Diesel Engine
Owner’s Manual
D7 Marine Diesel Engine
The BMW D7Marine Engine: 4.5 kW (6 bhp). Particularly suitable for sailing boats and open displacement boats up to approx Z5 metres (24′) and 2 tons.
This ideal diesel engine for relatively small boats is in a class of its own. With its compact dimensions, ex-tremely low weight (only 68 kg/150 lb) and sophisticated design with no mov-ing parts on the outside, it is even suitable for boats which, due to a lack of space, had to be fitted with an out-board engine. The patented lubrication system allows continuous operation at an angle of heel of up to 20′.
Special features:
- Extremely low weight thanks to cast aluminiuni crankcase
- Compact dimensionsfits into virtually any boat
- Reliable operation even with a considerable angle of heel (up to 201, depending on the angle at which the engine is installed
- No moving parts on the outside and, therefore optimum safety against injuries
- Simple, inexpensive maintenance
- Optimum corrosion-proofing through two-component paintwork and two zinc anodes.
- Bosch fuel injection pump with mechanical control and self bleeding optimum combustion and clean exhaust emission
- Flexible engine mounts to minimize vibrations to the boat’s hull
- Alternator (integrated in flywheel) and a heavy duty starter
- Easy-to-operate manual starter with starting handle and automatic decompression: yet another safety feature fitted as standard
- Reduced-ratio reversing-type gear-box fora wide range of different applications
- Thermostat-controlled salt water cooling to provide a constant operating temperature
- Low fuel consumption: 1.5 Itr/0.33 Imp gals per operating hour at maximum output
- High-performance fuel supply filter with water separator
- Air filter with intake air silencer
- Electrical wiring complying to the strict US Coast Guard regulations. resetable fuses to provide extra safety against overload
- Engine and gearbox prepared by the factory for single-lever remote control of throttle and gear shift
Conclusion:
The D7 has a wide range of exceptional advantages. This applies not only to the D7, but to all marine engines that bear the symbol of progressive engineering.
BMW’s complete range of marine en-gines for sailing boats and motor yachts offers all kinds of options and a wide choice of diesel and petrol units. You can also choose from a wide range of optional extras and accesso-ries to meet your personal require-ments. And to make sure that you enjoy sheer boating pleasure for a long time to come, BMW Marine’s international dealer organization has trained marine technicians at your service as well as a reliable and quick supply of parts. 
Specafications D7
| Displacement and output (DIN 6270 B) | Displacement 280 cc (17.1 cu in) Stroke 67 mm (2.64″), bore73 mm (2.87″) |
| Max continuous output 4.5 kW (6 bhp) at 3600 rpm | |
| Compression ratio 22:1 | |
| Design and installation |
Water-cooled single-cylinder four-stroke engine in up-right position, direct injection; forged-steel crankshaft |
| Operation at a permanent angle of heel of up to 20° | |
| Flexible engine mounts | |
| Weight | Dry weight of the complete engine unit 68 kg (1501b) |
| Valves | Valve drive: via rocker arms and tappet rods |
| Lubrication | Centrifugal forced-feed lubrication (splash lubrication) |
| Fuel supply system | Bosch fuel injection pump |
| Direct Injection Into spherical combustion chamber | |
| Air filter with air intake silencer | |
| Fuel supply by mechanical fuel pump with additional manual control | |
| Engine cooling | Single-circuit cooling with directly connected water pump |
| Electrical system | 350 W,14 V, 25 A alternator |
| 0.8 kW starter | |
| Power transmission | Torsion damper between engine and gearbox |
| Reversing-type gearbox | Reversing-type gearbox with neutral position, forward and reverse |
| Direction of rotation: clockwise in forward gear, on connection flange of reversing-type gearbox | |
| Standard ratio: forwards 2.7:1; reverse 1.9:1 alternative: 2.8:1; 2.3:1 |
|
| Standard fittings | Manual starter with starting handle and automatic decompression, zinc anodes |
| Automatic bleeding of fuel system fuel filter with water separator | |
| Engine with donilete wiring loom and multi-pin plug, instrument panel with starter switch, battery charge indicator, coolant temperature indicator and two blank ho es for additional instruments | |
| Optional fittings | Single-lever control with cable, complete stern gear and exhaust system, various additional instruments |
| D5 approved in the Federal Republic of Germany with no licence required Max output according to DIN 6270 B 3.57 kW (4.85 bhp) at 3070 rpm | |
| Subject to change In design and technical features |
Your BMW Marine Dealer:
BMW Marine GmbH Munchen
01802128233 10/82
Printed in West Germany
Documents / Resources
 |
BMW Marine D7 Marine Diesel Engine [pdf] Owner's Manual D7, Marine Diesel Engine, Diesel Engine, Marine Engine, D7, Engine |
