Patent ID: 8628364
Filing Date: 2014-01-14
Classification: B63H,F02M

Abstract:
1. An outboard motor in which exhaust produced by driving of an engine is emitted into water via an exhaust passage, comprising: a throttle valve connected to an air intake port of the engine via an air intake manifold, a control motor for driving the throttle valve to open and close; and a controller for controlling the control motor, wherein the controller is configured to control the control motor such that the throttle valve fully closes when a decision is made that reverse rotation is occurring in the engine by determining that an actual engine rotating speed is less than a lower limit reference speed for said engine, the exhaust passage communicates with the air intake manifold via a communication passage, and a communication valve which opens only when reverse rotation is occurring in the engine is located in a portion where the communication passage and the air intake manifold are connected.