Re: Diesel Maintenance and Repair Classes ?
Although I have don't have personal experience with Mack Boring, I've heard it's a good class if you have a Yanmar.
I did take the diesel classes from "The Annapolis School of Seamanship". The class there is not concerned with any brand and you will work on several different makes. I cannot say enough about what a great education I got there. I took both the 2 day basic class and the follow on 2 day level 2 class. I'm an engineer by day and I thought I knew the basics, but there were a few real gems I learned even on the first morning. Highly recommended!