Outboard motor

An outboard motor, comprising:

• a lower case having an open top end and covering a main frame that supports a power source and a drive shaft for transmitting a power output of the power source;
• a bottom frame supporting a propeller, and a gear mechanism for transmitting the power output from a lower end of the drive shaft to the propeller;
• and
• an upper case attached to the open top end of the lower case in a detachable manner,
• wherein the upper case is provided with a top recess provided in a top surface part of the upper case, and a pair of side recesses provided on either side of the upper case, the top recess at least partly overlapping with the side recesses with respect to a fore and aft direction in normal operation, and
• wherein the top recess is defined by a slanted wall that has a certain lateral width substantially smaller than an overall width of the upper case and slants downward away from a general outer profile of the upper case toward a front part thereof and a pair of triangular side walls extending vertically along either side edge of the slanted wall so as to define a rectangular opening facing rearward.

An outboard motor, comprising:

• a lower case having an open top end and covering a main frame that supports a power source and a drive shaft for transmitting a power output of the power source;
• a bottom frame supporting a propeller, and a gear mechanism for transmitting the power output from a lower end of the drive shaft to the propeller;
• and
• an upper case attached to the open top end of the lower case in a detachable manner,
• wherein the upper case is provided with a top recess provided in a top surface part of the upper case, and a pair of side recesses provided on either side of the upper case, the top recess at least partly overlapping with the side recesses with respect to a fore and aft direction in normal operation, and
• wherein the upper case comprises a pair of side parts jointly forming a cylindrical shell defining open top and bottom ends, and a top part attached to the open top end of the cylindrical shell formed by the side parts, and the top recess is formed in the top part while the side recesses are formed in the side parts, respectively.