GJ Diesel Repairs located in the beautiful Whitsundays are your local authorized dealers for MAN, John Deere Marine, Seasall Hyundai, Nanni Diesel and Vetus Maxwell. Our experienced team of marine diesel fitters and engineers can service, repair, overhaul and install all types of marine diesel engines. With over 35yrs marine experience and 25yrs operating in the Whitsundays. We have the experience, facilities and specialized tooling to carry out any work required to your diesel engines.