Wärtsilä 31 engine to power new fishing vessel by admin September 8, 2016 September 8, 2016 Wärtsilä Corporation, 8 September 2016 at 10 am EET – The Wärtsilä 31 engine, which has been recognised by Guinness World Records as being the world’s most efficient 4-stroke diesel… 0 FacebookTwitterLinkedinEmail