I have had my M38A1 (1953) running over the past couple of years but it has been hard to start at times both while cold or hot. Since this vehicle is at my property, I only have a chance to run it every few weeks. I am not an experienced mechanic, I learn by doing and redoing. The vehicle had a Carter YF carb on it when it was purchased. I was given a YS carb with the vehicle, rebuilt it, and installed it on the engine. The engine started ok but ran rich. My grandson and I stalled the jeep while driving and I have not been able to get it started since. I finally have time to work on it and wanted to know which carb (YS v YF) is the most consistent performer for the M38A1. I would appreciate thoughts on how to make my engine more reliable starting. I replaced spark plugs and cables and plan to clean and adjust points and install a new condenser. As far a I can tell, the fuel pump is original.