I have a Ford 601 Workmaster. I used the tractor back in October and everything was fine. It set in the barn until this last weekend when I needed it. I put some gas in it and finally got is started but it smokes BAD! It has never smoke like this before. I have let it idle about 20 minutes and it is still smoking terribly, It is definitely burning oil. I love the tractor (owned it about 8 years), but I am not much of a mechanic although I have been able to fix everything that has went wrong in the last eight years. Can someone tell me what is wrong with it and what I need to do?