Motorized watercraft system with interchangeable motor module

A stand-up paddleboard comprising:

• a body including a top surface and a bottom surface, the bottom surface having a recess extending generally toward the top surface, wherein the recess is formed as an elongated depression along the length of the body, and wherein the recess is positioned in the bottom surface such that at least a portion of the body continues to extend rearward of the recess;
• one or more fin boxes disposed on the portion of the body rearward of the first recess;
• a drive system disposed within the recess, the drive system including at least one electric motor and at least one impeller coupled to the at least one electric motor;
• wherein the recess is covered by a base surface separate from the bottom surface of the body, the base surface having at least one water intake port and at least one water exhaust port;
• a water flow channel formed between the at least one water intake port and the at least one water exhaust port;
• wherein the drive system and the water flow channel are contained within the recess between the base surface and a bottom of the recess;
• and
• wherein the base surface substantially matches the adjacent bottom surface of the body around the recess to form a smooth bottom having the water intake and exhaust ports therein.