What about the 29 with a 6.7 Cummins? Is the installed height about the same, JD and Cummins? Either engine would add 600 lbs. over a small Yanmar, but the larger displacement and slower speed usually provides a more efficient fuel burn.So what is top speed? 3+ mpg at 22 knots seems too good to be true. Impressive if those numbers are accurate. I’m thinking a 29’ Webbers with a 315hp John Deere would be a great combo.
Searching online, it appears that a 22" prop can be installed in the 29' model. That would work well with a 340+ hp engine.