Key West Engine Service, Inc. is your complete source in Key West and the Florida Keys for Caterpillar, Detroit Diesel, Cummins, and John Deere marine engine parts, sales, service and maintenance. We've been in business since 1985 and have built an outstanding reputation in all areas of the Keys. We are a factory authorized dealer for Caterpillar, Detroit Diesel, Cummins, John Deere, Northern Lights generators, and Twin Disc transmissions and controls and provide complete warranty service for these products.. Authorized Sales and Service with On-Site dockage for repairs.