It may not be exactly what you''re looking for, but I recently attended courses on Marine Diesel Maintenance offered by Mack Boring & Parts Co. and was highly impressed. The course was in north New Jersey, but they do have other locations. The first course is a one day overview of the different systems (cooling, electrical,
fuel, lubrication). This course is a pre-requisite for the two day, hands on course. During the two day course, we changed raw water impellers, removed and replaced heat exchangers, replaced primary and secondary
fuel filters, bled high and low pressure
fuel lines, replaced injectors, re-torqued the head and adjusted valves. People who had Yanmar engines worked on the same model engine that they have on their boat. Since I have Volvos, I worked with a comparable Yanmar. I was highly impressed and found the courses very helpful. You should be able to contact them by calling 1-800-Mack Engine, I believe that the best contact person is Lorainne.