About Us

Our History

Coleman Marine Diesel is a family owned and operated diesel repair shop and has been serving Shelter Island, San Diego since 1983.  Gary and Gretha Record are the new owners and have been providing the same excellent customer services since 2019.  We are a factory authorized warranty dealer for Cummins, Onan, MAN, and Twin Disc.

We have full time staffed parts counter and experience and skilled staff ready to assist you with anything.  We are fully insured and able to perform services on boats while in slip at their marinas.  

Factory Authorized Warranty Dealer