I replaced every component, switch, wire, fuse, coil, etc trying to chase down my no spark issue. Finally I found it to be the lifter, not lifting the points. I pulled the tappet out, chocked it up in a drill and polished it with 400, 800 then leather. I polished the inside of the journel that it rides in as well. It's as smooth as butter in there but as soon as I bolt it to the engine, it won't go up and down. Please look at the photo and tell me if that piece of metal (in the hole in the block) is supposed to be there. I think that's what it's hitting/binding on. It almost looks like that was some sort of bearing that slipped over. btw. I can watch the cam lobe spin when I crank the engine. I can loosely hold the tappet in the hole without the guide and feel it going up and down. Any help appreciated. Thanks! Also... this has been a recurring problem. Tractor has done this several times and each time, I remove the points check the tappet and put everything back together and then it works again... until I shut it off... then no start and the circle begins again.