BMW D7 Owners Manual

1 Owners Manual D7 BMW Marine Engines This copy of the BMW D7 Owners Manual has been re-created using images computer scanned from a manual rather than original artwork. It has also been re-formatted in “portrait” style to display and/or print better on computer systems.

2 This manual was written on your behalf in an effort to help you enjoy your new BMW Marine Engine to the maximum. No marine engine, be it the best in the world, will perform at it’s best during a long life, without proper care and maintenance. Please read this manual carefully before you set out on the first trip with your new BMW Marine Engine. For the practical boat owner, some maintenance procedures are described in this manual. Next to some jobs, you will find this marking which indicates that the work will require special tools as well as certain special knowledge. It is, therefore, recommended that your authorized BMW Marine Dealer complete these operations.

3 INDEX ENGINE DESCRIPTION 4 INSTRUMENTS AND CONTROLS 6 STARTING AND OPERATING 7 SERVICE & MAINTENANCE 12 FUEL SYSTEM 13 LUBRICATION SYSTEM 16 COOLING SYSTEM 17 VALVE SYSTEM 19 ELECTRICAL SYSTEM 20 WINTER LAY UP AND RECOMISSION 21

4 ENGINE DESCRIPTION The BMW D7 is a single-cylinder, four-stroke, direct-injection diesel engine. The engine is equipped with a raw-water cooling system, fed by an impeller type pump driven by the crankshaft. Electrical starting and charging systems are standard as is an automatic air bleeder device in the fuel system. Technical Data Displacement 280cc 17.0 cu in Stroke & Bore 67 x 73 mm 2.63 x 2.87 in Max output at min -1 (RPM) 4.5 kW / 3600 6 HP / 3600 Max torque at min -1 (RPM) 11.7 Nm / 3300 1.2 kpm / 3300 8.7 lb ft / 3300 Compression Ratio 19:1 Weight, dry engine incl. Gearbox 68 kg 150 lb. Gearbox reduction 2.7 Maximum engine inclination 15 deg

5 Specifications Engine Gearbox Fuel Diesel Oil DIN 51601 (USA #2) Fuel Filter BMW 13 32 1 329 270 Lubrication oil Type Capacity – Litre (US gal) HD-API CC/CD SAE 30 1 litre (0.26 US Gal) ATF Dexron 0.4 litre (0.1 US Gal) Air Filter BMW 13 71 1 329 269 Injector make Bosch Injection pressure 135 + 8 bar Injection pump Bosch PFE 1 Q 55/19 Starter motor make Bosch Alternator, charging capacity 14v 350w Battery, rec capacity 12v 60 Ah Polarity Negative ground Raw-water pump Johnson Gearbox Hurth HBW 5 Adjustment Data Injection ends 11.5 – 12.5 deg BTDC Tappet clearance 0.15 mm .006 in Torque Nm lb.ft Injector retainer 10 7.2 Cylinder head bolts 35 25

6 INSTRUMENTS & CONTROLS Instruments The BMW D7 is equipped with an instrument panel as shown: 1. Starter Switch – with three positions: ”O” – the circuit is switched off, and the key can be removed ”II” – the current is switched on and the alternator charging control lamp lights ”S” – the started is engaged. When the engine fires the key should be released and will automatically return to position “II” 2. Alternator Charging Control Lamp – is normally out when the engine is running above idle speed 3. Engine Temperature Control Light – should be out at all times except if engine temperature exceeds 70 o C or 160 o F. In such cases the engine must be stopped at once or severe damage may occur. Find the trouble before the engine is restarted. 4. The panel also has a reserve lamp marked “OIL”, which is not connected Controls Throttle and gearshift are both operated by single-lever remote control, which works as shown: N = Neutral F1 = Forward gear engaged F2 = The RPM increases B1 = Reverse gear engaged B2 = RPM increases To disengage the gearshift mechanism, push the knob – 2 – fully in, for instance when starting the engine. Aloha Owners Association note – the control fitted to Aloha 27s is not always the same as this, and in some cases you pull the knob OUT to disengage.

7 STARTING AND OPERATING The Decompression Valve The automatic decompression valve makes starting easier, particularly manual starting. The valve is operated by a twist grip. In the “O” position the valve is closed, while in the “1” sector it is open, but the automatic control device is not engaged. Turning the grip further – always clock-wise – will engage the automatic control. When the engine is cranked, the valve will automatically return notch by notch to the “0” position. This takes four full turns of the crank handle and the speed gained thereby should make the engine fire at the first following compression stroke. Use of the decompression valve is also helpful when the battery is too low for sufficient cranking speed. NOTE – never use the decompression valve to stop the engine

8 Cold Starting Device Situated next to the injection pump (on the starboard side just forward of the dipstick). When starting a cold engine, the knob is pulled out fully and the RPM control (throttle) in cockpit pushed to the “full” position, with the gear disengaged. Cold Weather Starting Aid A cold start primer is located on top of the cylinder head. Fill with diesel or lubricating oil with the cover removed and press the cove r fully down prior to starting. Engine Shut-Off Control Pull the handle and hold it in this position until the engine has completely stopped.

9 Air Bleeding The BMW D7 fuel system incorporates a fully automatic air-bleed device. Prior to starting up after a long rest period or when the fuel system has been worked on, operate the primer pump some 30 – 50 strokes, which will save the battery and starter. (For location of primer pump see diagrams on pages 13 & 15) Starting A Cold Engine § Check that the gear-shift is in neutral § Set the throttle at the “full” position § Turn the starter switch key to the “II” position ans check that the alternator charging control lamp comes on § Turn the key to the “S” position which will engage the starter motor. When the engine fires evenly, release the starter switch key § Set the throttle at normal idling Important – see NOTES on next page. A running-in period of approximately 10 hours when the maximum RPM should not exceed 3000 min -1 will prolong engine and gearbox life. After these 10 hours, the engine should be checked by a BMW Marine Dealer in accordance with the instructions in the service section. Always check the engine oil level, prior to the first starting of the day.

10 NOTE If outside temperature is extremely low, the primer device on top of the cylinder head (see diagram on page 8) sgould be filled with diesel or lubricating oil and the plug fully pressed down to inject the oil into the intake manifold. NOTE Since a diesel engine is dependent on a certain compression pressure = heat to ignite the fule, one may have to operate the starter for longer periods than is the case with a gasoline engine. Under no circumstances should the starter be engaged for more than thirty seconds at a time. A battery too low for sufficient cranking speed will doom the starting from the beginning and the battery will drain very rapidly. In such a case, try the decompression valve, or crank the engine manually. Starting A Warm Engine § Check that the gear-shift is in neutral § Set the throttle at the “full” position § Turn the starter switch key to the “II” position ans check that the alternator charging control lamp comes on § Turn the key to the “S” position which will engage the starter motor. § Release the key as soon as the engine fires § Decrease the RPM to normal idling § Check that the alternator charging control lamp is out and the gear-shift is re- engaged

BMW D7 Owners Manual

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