Cooling device for ship propulsion machine

A cooling device for a ship propulsion machine, the cooling device being provided in the ship propulsion machine, taking water of an outside of the ship propulsion machine into the ship propulsion machine, cooling a power source of the ship propulsion machine by flowing the taken water around or inside the power source as cooling water, and discharging the cooling water after flowing around or inside the power source to outside of the ship propulsion machine, the cooling device comprising:

• a drain passage configured to discharge the cooling water after flowing around or inside the power source to the outside of the ship propulsion machine;
• and
• a collector provided between an upstream portion and a downstream portion of the drain passage and configured to collect a fine object contained in the cooling water flowing from the upstream portion of the drain passage toward the downstream portion of the drain passage,
• wherein the collector includes
• a collector main body configured to collect the fine object, through which the cooling water passes,
• a case having a tubular shape having an axis extending in an upper-lower direction and accommodating the collector main body,
• an upper connection pipe extending in the upper-lower direction, whose upper end portion is connected to the upstream portion of the drain passage, whose lower end portion is connected to an upper portion of the case, and through which the cooling water flows from the upstream portion of the drain passage into the case, and
• a lower connection pipe having flexibility, whose upper end portion is connected to a lower portion of the case, whose lower end portion is connected to the downstream portion of the drain passage, and through which the cooling water flows from the case into the downstream portion of the drain passage,
• wherein a first bent portion is provided between the upper end portion and the lower end portion of the lower connection pipe,
• wherein a second bent portion is provided between the first bent portion and the lower end portion of the lower connection pipe, and
• wherein the lower connection pipe extends downward from the upper end portion thereof along an axis of the case, bends at the first bent portion, extends downward while being inclined with respect to the axis so as to be separated from the axis, bends at the second bent portion, and extends downward while being inclined with respect to the axis so as to be close to the axis.