The insurance approved Volcano Bolt Lock represents the pinnacle of OML’s bolt lock development.It is now regarded by many in the industry as the best bolt lock on the market as it has been designed and built to resist removal by the most robust actions.For engines: EVINRUDE: 40-250hp.HONDA: 40-225hp.MARINER, MERCURY: 25-275hp.SUZUKI, JOHNSON: 25-300hp.TOHATSU, NISSAN: 40-115hp.YAMAHA, SELVA: 25-225hp.