Abstract: An axis line of a cylinder and a cylinder head of a four-stroke engine is disposed inclining to one side in a lateral direction with respect to a center line extending in a front-rear direction of the outboard motor from a top view, and a fuel tank is disposed on a side portion of the cylinder and the cylinder head in another side in the lateral direction with respect to the center line.

Abstract: An axis line of a cylinder and a cylinder head of a four-stroke engine is disposed inclining to one side in a lateral direction with respect to a center line extending in a front-rear direction of the outboard motor from a top view, and a fuel tank is disposed on a side portion of the cylinder and the cylinder head in another side in the lateral direction with respect to the center line.

Abstract: An axis line of a cylinder and a cylinder head of a four-stroke engine is disposed inclining to one side in a lateral direction with respect to a center line extending in a front-rear direction of the outboard motor from a top view, and a fuel tank is disposed on a side portion of the cylinder and the cylinder head in another side in the lateral direction with respect to the center line.

Abstract: An outboard motor is steerably mounted to a hull via a bracket and a steering arm is mounted to a steering bracket unit attached to the outboard motor. The steering arm includes a shift grip as a shift operating unit, a throttle grip as a throttle operating unit and a throttle adjusting knob as a throttle adjusting operating unit. These units are adjacently disposed in the described order in a forward direction of a hull.

Abstract: An outboard motor is steerably mounted to a hull via a bracket and a steering arm is mounted to a steering bracket unit attached to the outboard motor. The steering arm includes a shift grip as a shift operating unit, a throttle grip as a throttle operating unit and a throttle adjusting knob as a throttle adjusting operating unit. These units are adjacently disposed in the described order in a forward direction of a hull.

Abstract: A muffler assembly of an internal combustion engine comprises an inner casing in which is defined a first expansion chamber into which is inserted one end of the exhaust pipe having another end connected to an exhaust gas port of the engine, an outer casing disposed outside the inner casing so as to define second and third expansion chambers between the inner and outer casings, a first baffle pipe disposed so as to mutually communicate the first and second expansion chambers, a second baffle pipe disposed so as to mutually communicate the second and third expansion chambers, and a tail pipe member disposed so as to communicate the third expansion chamber and the outside of the outer casing. The inner and outer casings are formed by two plate members, respectively, which are secured together when the muffler assembly is assembled. A sound absorption chamber is formed around the outer periphery of the tail pipe.