Abstract: A watercraft has an engine that has an intake system, an exhaust system, and a cooling system. An intake manifold is positioned above a cooled exhaust pipe. This position of the intake manifold with relation to the cooled exhaust pipe allows the intake manifold to maintain a predetermined temperature without the aid of any water-cooling of the intake manifold.

Abstract: An outboard motor has a drive unit and a bracket assembly mounted on an associated watercraft to carry the drive unit. The drive unit has a steering shaft supported by the bracket assembly for pivotal movement about a steering axis that extends generally vertically. An engine of the outboard motor has throttle valves that regulate an amount of air to combustion chambers of the engine. A handle bar extends from the steering shaft. The handle bar includes a throttle valve control grip disposed at an end portion of the handle bar for pivotal movement about an axis of the handle bar. The control grip is connected to the throttle valves to operate the throttle valves. A lock mechanism can inhibit the control grip from rotating. The lock mechanism is positioned at a terminal end of the end portion.