MAPP Gas- I am told you can use propane to do this, but it takes longer to get enough heat. I have wasted quite a bit of the brazing rods to get this far, but the quality of the braze IS improving, so I guess I will continue along this line. Mind you, the brazing rods are pricy- so is the MAPP gas- but I am encouraged by the improvement I see. This is the right tank- if I can crank out the left tank much better, I will re-do the right one from scratch. The gas fill fitting is a chunk of aluminum rod threaded with 1" tapered pipe thread (plumbing thread). The cap is an end cap for the same out of brass- I turned in on my lathe to get rid of the casting surface and went through several grades of sandpaper, including wet-dry, to achieve what you see here. When the tank is complete, the cap will get the rouge wheel and Brasso for a final shine, along with a 1/32" hole in the center top for venting. The drain fitting is 1/2 inch turned aluminum bored out with a 1/8" tapered pipe thread- this hooks it up to a glass bowl filter, which then has a barb connection to the other filter and the carburetor.
Is BONDO worth a squat on aluminum? I've very little experience with it.
