Diamond Marine is a marine dealership located in East Haven, CT. We sell new and pre-owned Boats and Outboards from Mercury, Carolina Skiff, Steiger Craft, and other brands. Our huge Indoor Showroom (the largest in the Northeast) lets you comparison shop a wide range of new and used vessels... easily comparing models, features, and boat designs. Diamond Marine supports its customers with an expert Service Department and Parts Group. Our technicians, with over 25 years of experience, are qualified to repair and service all makes of outboards, inboards, and IO's. We offer complete engine service & repair of all brands of inboard and outboard motors and are manufacturer-trained and certified in Yamaha | Mercury | Mercruiser | Suzuki | Volvo-Penta We use the latest technology to diagnose mechanical and electrical problems and whether you're in for repair or standard maintenance, we get your boat back to you rapidly and efficiently. Our factory-certified technicians regularly attend training classes to keep updated on all the latest innovations. We have inside service bays to keep our people working rain or shine. Diamond Marine's service philosophy is simple: preserve the customer's investment and help maximize time underway through preventative boat maintenance. In addition to providing needed service and scheduled warranty maintenance of all of the brands that we sell, Diamond Marine's state-of-the-art facilities and full-time service staff are experts in the maintenance, repair, and restoration of vessels of all makes and sizes.