Manifold for outboard motor

摘要

An intake manifold for an engine powering a water propulsion device of an outboard motor is disclosed. The engine has first and second combustion chambers and an intake system for delivering a fuel and air charge to each combustion chamber. The intake system includes a first intake passage leading through the engine to the first combustion chamber and a second intake passage leading through the engine to the second combustion chamber, the first intake passage positioned vertically above the second intake passage. The intake manifold is arranged to deliver equal amounts of fuel to the first and second intake passages and includes a main passage extending along a first axis. A first branch defines a passage leading the main passage to the first intake passage, and a second branch defines a passage leading from said main passage to the second intake passage. The main passage divides into the passages defined by the first and second branches at a bifurcation positioned along the axis, the passage of the first branch defined by a first wall part extending in a first direction from the bifurcation and at a first angle with respect to the first axis, and the passage of the second branch defined by a second wall part extending from the bifurcation opposite the axis and at a second angle from the first axis, the second angle exceeding the first angle.