3732 Boat Building and Repairing Establishments primarily engaged in building and repairing boats. Establishments primarily engaged in manufacturing rubber and nonrigid plastics boats are classified in major group 30. Establishments primarily engaged in operating marinas and which perform incidental boat repair are classified in Transportation, industry 4493; membership yacht clubs are classified in Services, industry 7997; and those performing outboard motor repair are classified in Services, industry 7699.