Most of us know that our Universal engines are really Kubota tractor engines in disguise. When I went to a Kubota dealer for parts, however, they refused to help unless I could tell them which tractor the engine was used in. I knew I had a D850 engine but not what machine it was used in. I found the attached cross reference list on the internet showing what engines were used in which machines. In my case the M25/D850 was used in three different machines any one of which will give the correct part numbers as long as you are not looking for cooling or exhaust parts.