Seriously you need two more things in addition to your fire extinguisher if you really want to keep your combine from going up in smoke. they are a couple of 2 1_2 gallon jugs of water tied on somewhere, because the fire extinguisher won't hold a chaff fire from reflairing, and one of those 3'handle dirt spades. Why the shovelIJ Because when your extinguisher is empty and your water used up you still have an unlimited supply of soil or dirt, usually moist that you can throw on the fire. The last oil fire we had 5 fire extingushers couldn't put it out, water didn't either, only the shovel and the soil did.