Abstract: Disclosed herein is an outboard motor comprising an internal combustion engine including a lower surface having therein an exhaust gas discharge port, a drive shaft housing having an upper end including an upper face fixed to the lower surface of the internal combustion engine, an outer surface extending downwardly from the upper face, an interior vertically extending main exhaust gas passage extending from the upper face and communicating with the exhaust gas discharge port, an idle exhaust gas relief passage recessed in the upper face and in spaced relation to the main exhaust gas passage, and closed by the lower surface of the internal combustion engine, and an idle exhaust gas outlet port located in the outer surface and communicating with the idle exhaust gas relief passage, and an idle exhaust gas relief tube communicating between the main exhaust gas passage and the idle exhaust gas relief passage and having a portion extending vertically within the main exhaust gas passage and terminating in spaced re

Abstract: Disclosed herein is an internal combustion engine comprising a carburetor having an air induction passage, a valve member located in the air induction passage and moveable between open and closed positions, and a fuel supply valve member moveable between open and closed positions, an air intake silencer communicating with the air induction passage and including spaced exterior brackets including aligned openings, an actuating member received in and support by the aligned openings for rotary and axial movement relative thereto, connected to one of the valve members for actuation of the one member between the open and closed positions in response to axial movement of the actuating member, and connected to the other of the valve members for actuation of the other member between the open and closed positions in response to rotary movement of the actuating member.