No. Under this heading, a sailboat retains its classification as a sailing vessel regardless of whether it carries an auxiliary motor, provided wind propulsion remains the primary means of locomotion. If a vessel is designed primarily for motor propulsion with a sail as a secondary feature, it would be reclassified as a motorboat, which carries different duty treatment.

Used sailboats require a formal customs entry, proof of foreign manufacture (or prior US exportation if returning), and compliance with USCG hull identification number requirements. If the vessel was previously documented in a foreign registry, the importer may need to cancel that documentation and apply for US Coast Guard documentation or state registration. EPA engine emissions compliance for the auxiliary motor should also be verified.