Adventure Will a Jet Ski Sink If I Fall Off? Posted by David T on May 10, 2022 Read Next → Adventure 17 Jet Skiers Having High Speed Fun On The Water Adventure 25 Hiking Views of El Caminito del Rey Mountain Path Andalusia, Spain Adventure 24 Views of Danger Trail Mount Huashan [Most Dangerous Hike in the World] A jet ski will not sink because its hull is filled with flotation foam. It may barely float, but it will not sink. jetski David T Read Next → Adventure 17 Jet Skiers Having High Speed Fun On The Water Adventure 25 Hiking Views of El Caminito del Rey Mountain Path Andalusia, Spain Adventure 24 Views of Danger Trail Mount Huashan [Most Dangerous Hike in the World]