I will share my story about replacing my 18 horse Kohler engine with a Briggs Stratton 23 hp Vanguard from Small Engine Warehouse in Muncie, IN. This was a kit designed to do the swap. The old Kolhler did not have a fuel shutoff on the carb, the Vanguard does. The wiring that came on the engine had made provision to power this fuel shutoff solenoid during the run phase but not the start phase. Thus, when I tried to start this Vanguard, it would not start. If I shot a little fuel in the spark plug holes and replaced the plugs, it would start right up and run great. I thought the problem was the fuel pump and bought a new one that did not help. I finally traced down the wiring and found no power went to this solenoid when the key switch was in the start position. Very frustrating and a slip-up on the part of Small Engine Warehouse. I am still trying to figure out how to correct this issue.