Transom mounted marine propulsion device with fore and aft crankshaft and power shaft

A marine propulsion installation comprising a boat with a transom having therein an opening, and a marine propulsion device including a power head extending, in part, through said transom opening and fixedly mounted to said boat hull, said power head including an internal combustion engine having a crankshaft which extends fore and aft and horizontally, a power shaft extending below said crankshaft in parallel relation thereto, means operatively connected between said crankshaft and said power shaft for rotating said power shaft in response to rotation of said crankshaft, a lower unit connected to said power head and including a rotatably mounted drive shaft extending perpendicularly to said power shaft, said lower unit further including a propeller shaft, and means including gearing for connecting said drive shaft and said propeller shaft, and a reversing transmission operably connected between said power shaft and said drive shaft for selectively driving said drive shaft in neutral, forward and reverse drive.

A marine propulsion device comprising a power head adapted to be fixedly mounted to the transom of a boat and including an internal combustion engine having a crankshaft which extends fore and aft and horizontally when said power head is mounted to the boat transom, a power shaft extending below said crankshaft in parallel relation thereto, means operatively connected between said crankshaft and said power shaft for rotating said power shaft in response to rotation of said crankshaft, and a lower unit connected to said power head and including a rotatably mounted drive shaft extending perpendicularly to said power shaft, said lower unit further including a propeller shaft, and means including gearing for connecting said drive shaft and said propeller shaft.

A marine propulsion installation comprising a boat with a transom having therein an opening, and a marine propulsion device including a power head extending, in part, through said transom opening and fixedly mounted to said boat hull, said power head including an internal combustion engine having a crankshaft which extends fore and aft and horizontally, a power shaft extending below said crankshaft in parallel relation thereto, means operatively connected between said crankshaft and said power shaft for rotating said power shaft in response to rotation of said crankshaft, and a lower unit connected to said power head and including a rotatably mounted drive extending perpendicularly to said power shaft, said lower unit further including a propeller shaft, and means including gearing for connecting said drive shaft and said propeller shaft.