BMW Marine D7 Marine Diesel Engine Owner’s Manual
- June 3, 2024
- BMW Marine
Table of Contents
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″)
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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
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