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The MD5A is a single-cylinder, 4-stroke, marine diesel engine with direct injection and
sea-water cooling.
ENGINE ASSEMBLY
The engine block and cylinder head are made of cast iron. Cylinder angle 45
o
. The
cylinder liner is replaceable. The engine has overhead valves.
LUBRICATING SYSTEM
The lubricating system includes a full-flow oil filter which filters all the oil before it reaches
the lubricating points. A relief valve in the oil pump prevents the oil pressure from
becoming excessive.
ELECTRICAL SYSTEM
The engine has a starter motor and alternator with built-in rectifier. Voltage regulation is
taken care of by a transistorized regulator mounted on the alternator. The alternator
makes it possible to charge two battery circuits independent of each other if a charging
distributor (accessory) is fitted on the alternator.
A main fuse, which can easily be re-connected, is fixed to the engine. It protects the
electrical system from damage in the event of overloading. The wiring diagrams for the
engine and instrument panel are shown on page 27.
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