| 摘要 |
PROBLEM TO BE SOLVED: To reduce the difference between combustion efficiency of an upper cylinder and combustion efficiency of a lower cylinder. SOLUTION: In an outboard motor, an engine 9 is cooled by cooling water sucked from the lower part. A crankshaft 10 of the engine is vertically arranged, a plurality of cylinders are vertically arranged behind the crankshaft, and the combustion chamber sides of the cylinders are covered with a cylinder head. Intake passages 53 are provided between a silencer 51 and an intake port 33 of the cylinder head. Injectors 56 for injecting fuel are attached to the intermediate parts of the intake passages. On the upstream side from the injector 56, the inclination of the intake passages on the lower side is larger than the intake passage on the upper side. |
