The yacht called "Makin' Waves" was found beached with its engines running on Wednesday near St. Petersburg.
Yacht owner Arturo Millet Reyes says he reported it stolen days earlier from a marina in Cancun.
A resident of the Florida beach says he saw the boat motoring toward the beach and got ready to swim out in case the driver was having a medical emergency.
Gene Borg says there was no one on board. There were no signs of a struggle, though the TVs were gone.
The U.S. Coast Guard searched by air and sea Wednesday for anyone who may have been on the abandoned yacht, but suspended the search Thursday.