Check it by removing the lge brass oil pump valve body/tap from the bottom of the tube, draw your pump handle to the top, then (with oil in the tank) see if your oil is flowing out the bottom of the tube?. If there's no oil flowing out, you have a blockage to the inlet hole at the base of the tube, on the forward side of the tube, whether it still has a gauze or not. If the gauze is there, even if it is clogged you will see it thru the tube hole at the bottom, it will be on the forward side of the tube close to the tubes bottom end, as described. Use a strong torch & if you don't see the gauze, give that area a scratch with a peice of bronze welding rod or similar. If it's just blocked (no gauze) you may be able to scratch/push your way thru the blockage with the rod. The blockage will most probably be caused by layers of rust & gunk accumulated over the last 100years. Welcome to the 101 Owners Club ;-)
