watch 01:27 The Loop (Movies) Do you like this video? BoCo is a large, green diesel engine, and a character in Thomas the Tank Engine Tales. He works with Bill and Ben at the China Clay Works. BoCo is a Metropolitan Vickers Diesel Electric Type 2. Retrieved from "https://movies.fandom.com/wiki/BoCo?oldid=111936" Categories: Thomas the Tank Engine characters Add category Cancel Save Community content is available under CC-BY-SA unless otherwise noted.