Welcome to All Keys Diesel.  We are full service diesel repair company serving the entire Florida Keys, from Key West to Key Largo.  We are conveniently located in Marathon on US1.  We are dealers for Cummins, Caterpillar, Onan, ZF, Phasor, Westerbeke and Twin Disc.  All Keys Diesel services both marine and automotive engines as well as generators.  We also have technicians available to clean and treat fuel.  Please give us a call at (305) 289-2070 or stop by our shop at:    3988 Overseas Highway.  Marathon, FL. 33050.