21
WINTER LAY-UP AND RECOMISSION
Prior to winter lay-up or any long periods of rest the engine should he prepared for
storage, mainly to fend off corrosion. Either leave this job to the authorized BMW Marine
Dealer or do it you according to the following instructions:
Before the boat is taken out of the water
§ warm up the engine and remove the oil, see page 16
§ use preservation oil level with the dipstick lower marking
§ drain the gearbox oil and refill with ATE Dexron oil
NOTE - before the engine is recomissioned, the preservation oil must be removed and
replaced by recommended engine oil. Some kind of marking is useful as a reminder.
§ Mix 2 litres (0.5 US gal.) diesel fuel with 1 litre (0.25 US gal.) preservation oil in a
suitable container. Connect a hose to the ordinary fuel tank line or directly to the
primary filter inlet while the other end is inserted into the container
§ Start the engine and let it run for approximately 15 minutes
On dry land
§ Drain the engine cooling system, but without removing the cooling water pump
impeller
§ Shut off the raw water inlet and disconnect the raw water pipe at the pump
§ Mix approximately 12 litres of fresh water with 1.2 litres of emulsifying preservation
oil in a container. Always mix the oil with water, not the other way round, and stir
vigorously
§ Connect a hose to the raw-water pump and put the open end in the container
§ Start the engine and let it idle until the oil/water mixture is nearly gone. Stop the
engine. Make sure that no liquid remains in the system since it has no anti-freeze
qualities
§ Remove the injector and pour approximately 1 teaspoonful of oil into the cylinder.
Crank the engine a couple of turns and re-install the injector.
§ Give the engine and gearbox a good cleaning and a coat of oil to prevent rust
§ Lubricate control cables and linkage.
Recomission before launching
§ Remove all preservation oil in the engine and replace with recommended oil
§ Install the raw-water pump impeller
§ Remove the injector and crank the engine a few turns to get rid of surplus oil in the
combustion chamber
§ Change fuel filters
§ Refuel with fresh diesel fuel. Fuel left in the tank during winter storage should never
be used. Check lines and connectors
§ Start the engine after launching - do not forget to reopen the raw-water inlet. Warm
up the engine and check that there are no leaks in fuel or cooling systems.
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