Abstract: An outboard motor is provided that is capable of reliably separating water and air sucked in from an intake port and efficiently draining the separated water. The motor can comprise a cowling, a right-side intake port, a left-side intake port, first and second water separating portions, a communication port, and an engine compartment. The right-side intake port can be formed in a right side surface portion of an upper portion of the cowling. The left-side intake port can be formed in a left side surface portion of the upper portion of the cowling. The first water separating portion can have an intake passage communicating between the right-side intake port and the left-side intake port. The second water separating portion can communicate with the first water separating portion through the communication port, and the second water separating portion can communicate with the engine compartment.

Abstract: A watercraft has an outboard motor mounted to a hull and a remotely mounted air intake system. The outboard motor has an engine and an air/fuel mixing device. The air intake system is disposed within the hull and may include one or more filters for removing foreign materials and/or moisture from the intake air. The filtered air is routed via one or more ducts directly to the engine so as to not allow the outboard motor to appreciably heat the air before the air reaches the engine.

Abstract: A boat has an outboard motor mounted to a hull and a remotely mounted cooling air system. The outboard motor has a cowling housing an engine. The cooling air system receives air from within the hull and includes a ventilating fan box. The ventilating fan box may be located within the hull or the cowling of the outboard motor. Cooling air is routed via one or more ducts to the cowling so as to cool the engine while inhibiting moisture from the entering the cowling. The cooling air is preferably blown toward the bottom of the engine.

Abstract: An outboard motor is provided that is capable of reliably separating water and air sucked in from an intake port and efficiently draining the separated water. The motor can comprise a cowling, a right-side intake port, a left-side intake port, first and second water separating portions, a communication port, and an engine compartment. The right-side intake port can be formed in a right side surface portion of an upper portion of the cowling. The left-side intake port can be formed in a left side surface portion of the upper portion of the cowling. The first water separating portion can have an intake passage communicating between the right-side intake port and the left-side intake port. The second water separating portion can communicate with the first water separating portion through the communication port, and the second water separating portion can communicate with the engine compartment.

Abstract: A boat has an outboard motor mounted to a hull and a remotely mounted cooling air system. The outboard motor has a cowling housing an engine. The cooling air system receives air from within the hull and includes a ventilating fan box. The ventilating fan box may be located within the hull or the cowling of the outboard motor. Cooling air is routed via one or more ducts to the cowling so as to cool the engine while inhibiting moisture from the entering the cowling. The cooling air is preferably blown toward the bottom of the engine.

Abstract: A watercraft has an outboard motor mounted to a hull and a remotely mounted air intake system. The outboard motor has an engine and an air/fuel mixing device. The air intake system is disposed within the hull and may include one or more filters for removing foreign materials and/or moisture from the intake air. The filtered air is routed via one or more ducts directly to the engine so as to not allow the outboard motor to appreciably heat the air before the air reaches the engine.

Abstract: A device for controlling the ignition of an internal combustion engine to eliminate knocking and including a knocking sensor and method for detecting knocking. The knocking sensor is positioned in proximity to one cylinder of the engine and a reference signal is generated when another of the cylinders fires. This reference signal is compared with the output of the knocking sensor to determine a knocking condition.