Electric propulsion device

An electric propulsion device for propelling a boat, the electric propulsion device comprising:

• a propeller provided in a lower part of the electric propulsion device and configured to generate thrust for the boat;
• a motor provided in an upper part of the electric propulsion device and configured to rotate the propeller;
• an inverter provided above the motor and configured to control driving of the motor;
• and
• a cooling device configured to cool the motor and the inverter, wherein
• the cooling device includes
• an intake port configured to take water around the electric propulsion device into the electric propulsion device as cooling water,
• a drain port configured to discharge the cooling water taken into the electric propulsion device to around the electric propulsion device,
• a pump configured to flow the cooling water from the intake port to the drain port in the electric propulsion device,
• a motor water jacket configured to cool the motor with cooling water taken into the electric propulsion device, and
• an inverter water jacket configured to cool the inverter with cooling water taken into the electric propulsion device, and
• the motor water jacket and the inverter water jacket are connected in series between the intake port and the drain port in the electric propulsion device.