Outboard engine structure

摘要

An extension case in which an oil pan is accommodated includes on its left and right side surfaces mount receiving recesses for receiving a pair of lower mounts, respectively, and further an oil drain recess on the right side surface to which a drain bolt is exposed for draining oil from the oil pan. The oil drain recess is formed upwardly of the right mount receiving recess with a partition wall interposed therebetween and these recesses are opened at the right side surface of the extension case. When the extension case is produced by casting with two die parts which are divided into left and right sides, the arrangement makes it possible to form both the recesses simultaneously with use of one of the die parts.