A New Marine Base Engine is an engine which is produced by GM for the manufacturer of marine packages (ie. Mercruiser, OMC, Volvo, etc.), which these manufacturers use as the base for their finished product. We, in many cases can supply the Base engine eliminating the middleman at a greatly reduced price. Remember, the engine is new so it is has all the latest updates in design which may make it hard, or expensive to replace an earlier style engine. The engine usually includes, the block with all internal parts, heads, intake manifold, valve covers, circulating water pump, timing cover, harmonic balancer and oil pan. Simply bolt on you existing exhaust manifolds, electrical system and fuel system to complete the package.