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The MD7A is a 2 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. The engine has overhead
valves.
LUBRICATING SYSTEM
The lubricating system has a full-flow oil filter which cleans the oil before it reaches the
lubrication points. The oil pump has a relief valve which prevents the oil pressure from
becoming excessive.
ELECTRICAL SYSTEM
The engine has a starter motor and an alternator with built-in rectifier. Voltage regulation
is performed by a transistorized regulator, mounted on the alternator. The alternator
makes it possible to charge two batteries independent of each other, if a double-diode
(accessory) is fitted to 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 32.
TECHNICAL DESCRIPTION
