Connell Diesel Inc. is a full-service, fully authorized diesel fuel systems company. Our business is to provide sales and service for all types of diesel engines. The name Connell comes from W.J. Connell, who founded  the business in the 1950s to service the  New England area. We have carried on his tradition of old-fashioned values of excellence and quality. We at Connell Diesel are committed to dependable, reliable, and economical diesel engine service.

 Connell Diesel  is a member of Association of Diesel Specialists, an organization committed to the promotion of the diesel engine as an economical alternative to the gasoline engine.

We have the latest technology and equipment to meet all your service  requirements for diesel fuel injection now and in the future. Our drive-in service gives a "one-stop" service for diagnosing and repairing your diesel engine. We are an Authorized  Dealer for  Bosch, Stanadyne, Zexel, Denso, and Ambac (American Bosch) engine systems. We also service Delphi/CAV-Lucas, Caterpillar, and Cummins fuel systems. We have parts and service for your Navistar, John Deere, Ford, General Motors, Cummins, Volvo, and Caterpillar diesel engines to name a few. We are Maine's industry leader in diesel fuel injection sales and service for transportation, marine, industrial, construction, and agriculture.