Welcome To J&M Diesel

Servicing the Greater Seattle area  and ports around the world since 1983, J&M has been dedicated to providing exceptional light to heavy duty diesel truck and marine service.


Truck Services

At J&M Diesel we are dedicated to the reliability and peak performance of your light to heavy duty diesel trucks. Our technicians can accuratley diagnose and repair your Powerstroke, Cummins or Duramax Diesel and get you back on the road with a short turnaround.


Marine Services

From total overhauls to general maintenance, J&M offers a variety of services to keep your tugs and barges in working order. Our highly skilled technicians have been to ports around the world in order to keep marine diesels and ships in service.

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