Volvo Penta MD7A Instruction Book page 29

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LAYING-UP AND LAUNCHING LAYING-UP AND LAUNCHING
Run the engine at idle for 5 – 10 minutes in order to thoroughly
flush the engine with fresh water. Make sure that the exhaust
does not splash vital objects. Drain all water from engine an
reverse gear. Then close all draining cocks. NOTE! Do not let
the propeller rotate.
Remove all oil from the engine and from the reverse gear and
S-Drive respectively.
Change the oil filter. Fill up the engine, reverse gear and S-
Drive respectively to the correct level. Use the Volvo Penta
diesel engine oil with protective properties against corrosion.
Now the engine is ready to run on this oil during the coming
seas on.
Always use a special inhibiting oil if the lay-up will exceed one
normal winter lay-up. This inhibiting oil should be of the type
Esso Rustban 623, Shell Ensis Oil or of an equivalent type. If
inhibiting oil is used the oil filter must be replaced at the time of
launching the boat.
Prepare a rust-protection mixture consisting of fresh water and
5% Volvo Penta rust-protection-oil and emulsifying oil. NOTE!
Water first and then the oil.
Following rust-protection-oils can also be used: Esso Cutwell
40, Shell Donax C or equivalent. As an alternative to these oils,
a 40 % Ethylene Glycol-mixture can also be used.
Following for MD7A with reverse gear: An Ethylene-Glycol
mixture must be used when and if engine inclination exceeds
10°. Otherwise the water, which still remains, can cause
damage due to freezing.
Insert the hose into the rust-protection-mixture. Start the engine
and let it run in idling until the mixture is finished. NOTE! The
cooling water pump will be damaged if it runs without water.
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