EXHAUST DEVICE FOR TWO-CYCLE MULTIPLE CYLINDER ENGINE FOR OUTBOARD MOTOR

摘要

PURPOSE: To make exhaust interference difficult to occur in collecting exhaust gases exhausted from all cylinders into main exhaust passages. CONSTITUTION: The protruded parts 17 and 18 of an inner cover 12 are faced to the recessed part of a cylinder body to form an exhaust passage. The exhaust passage is constituted of passages e1-e6 for respective cylinders and main exhaust passages ER and EL to which the downstream ends of these passages e1-e6 are connected. Guide walls 26 nearing the cylinder body 2 are provided on partitioning walls 22 forming the upper wall of the passage e5 for cylinder. The guide walls 26 regulate an exhaust flow direction at the main exhaust passage ER so as to prevent the occurrence of exhaust interference.