Patent ID: 7888830

Claim:
A dynamo apparatus for a boat interposed between an engine and a power transmission, the dynamo apparatus comprising: a casing connected integrally with the engine and the power transmission, wherein: the casing is provided around a power transmission route from a crankshaft of the engine to the power transmission device; the dynamo apparatus and a cooling fan cooling the dynamo apparatus are constructed in the casing around a power transmission shaft and are driven by the power transmission shaft; the casing is cylindrical and comprises a connection surface at a side of the engine, a lateral surface having a connection surface at a side of the power transmission device and an outer peripheral surface between the connection surfaces; an intake hole is formed in the lateral surface of the casing at the side of the power transmission device at an inner peripheral side of the fan when viewed along the power transmission shaft and at a position evading the power transmission device connected to the lateral surface so as to induce air to the fan; and an exhaust hole is formed in a portion of the casing at the side of the engine so as to exhaust air from the fan.