My tachometer was not working so i changed the cable. It shows a 100 hours but i would say it has about 250 on it. It started running a little rough and would lose power. Now it will not stay running. I cleaned the air filter but it was so dirty that i went ahead and replaced it, put a new fuel filter on as well. I have been running through fuel lately with all the snow. So i did not think i had bad fuel. But i drained it all and put some more in. Now it will not even start. Sorry new to Kubota and diesel.