Newbie here. I work with a friend of mine doing tree service and our Kubota that we often use runs fine when the engine is cold, but once it is warm it begins to run very rough, and once it is completely heat soaked it is really tough to keep it running at all. I can't remember exactly which model it is, but I'm pretty sure it's a mid 90's or so L2900 with a 3 cylinder diesel. I can't get a hold of him right now to confirm year/model/engine. Just wondering where we might start looking to get the issue resolved, as we depend on it to assist us on many jobs and for general use around our lot. Thanks in advance!