Term: Outboard Motor Image: [{"name":"images\/public\/dictionary\/Outboard Motor_v3q5kshd.jpg","usrName":"Outboard Motor.jpg","size":101218,"type":"image\/jpeg","thumbnail":"images\/public\/dictionary\/thOutboard Motor_e0wox1r1.jpg","thumbnail_type":"image\/jpeg","thumbnail_size":101218,"searchStr":"Outboard Motor.jpg,!:sStrEnd"}] Definition: Internal combustion engine mounted at the transom that incorporates motor, driveshaft and propeller.