I'm not familiar with the model of Kubota that you reference.
We have a Nanni Kubota, circa 1985, 30 hp, 4 cyl. We debated
about replacing it with a new
Yanmar, but after we finally located the marinized
parts, our
diesel mechanic told us that the old Kubota would probably run forever. He thought it was a much
more durable
diesel than the newer ones. I have no frame of reference myself, but we're happy with the Nanni Kubota.
Also, we live in the Midwest & Kubota orange tractors are everywhere!
If you have specific questions that are related, let me know!
Jan