Here's the deal. I seemed to have picked up some water in my fuel from a local gas station. Obviously not a good thing. Ive drained the tank more than once. But still, when going up a hill (water is heavier, slides closer to pick up) the engine misses b/c of water. Its a very distinct feeling if you've never experienced it. Anyways, i figure the filter is probably shot, or full or whatever you call it. So i'll replace it right, but can't find it. Where is it?