Yanmar switched colors from Green to Red in the 80's from what I've been reading.
Yes Im sure that is correct. Maybe Im thinking the tractors with three number designations are u.s. market tractors. I have a 1401d and It is an import and is red. Also the 186d is u.s. and is red. I still like the old green yanmars. Heck, I like em all. Thats my problem. Ha Ha.