I bought a 54 NAA from a guy a week or so ago and I'm stumped. Tractor fired up, ran around his yard, picked up a 5' Box Blade and drove onto my trailer then stalled out and battery died before getting it started again. No biggie, older battery, had started and stopped a few times so maybe not much recharge time. Already converted to 12V Negative ground so easy enough to figure out if it's charging once I get it started again. Get it back to my new house (4 acres so the NAA is perfect size), throw a jump box on and it fires up just fine. Get it off the trailer, take a quick victory lap and head towards the shop maybe 1000' away to check the charging system and change fluids, etc. before putting her to work. Kick it in 4th, add throttle and it makes it maybe 200' and dies. Won't restart and run the jump box dry. Tow it the rest of the way to the shop and pull a plug (black soot but not wet), getting spark. Grab a tune up kit, change plugs (.025" gap), cap, rotor, points and condensor look new but change the cap and rotor because there's a smudge on the tip of the rotor and I'm already there. No start. Look at the ignition switch and there's maybe 3 strands of wire still connected, A-HA! Replace the switch and still won't start. Give it a little taste of starter fluid to the carb and it backfired... so here I am asking where I should start poking around next. Previous owner also said he put a new, rebuilt head on it recently AND the radiator is leaking from somewhere around the bottom corner near the hose.