| 摘要 |
PROBLEM TO BE SOLVED: To provide an outboard motor capable of preventing a spline coupling part between a crankshaft and a drive shaft from running short of grease as much as possible. SOLUTION: A crank chamber lower side seal (56) for sealing a lower side of a crank chamber (49) is provided among a cylinder block (46), a crank case (48) and a crankshaft (17). In a guide exhaust part (38), a through hole (63) inserted with a drive shaft (19) therein is formed. An upper surface of the guide exhaust part (38) is connected to lower surfaces of the cylinder block (46) and the crank case (48) in a liquid tight state. A guide exhaust side seal (67) is fitted into the through hole (63) of the guide exhaust part (38). A grease chamber (76) is formed between the crank chamber lower side seal (56) and the guide exhaust side seal (67). A grease supply groove (87) is provided on the upper surface of the guide exhaust part (38) and grease is supplied to the grease chamber (76). |
