I have a 3500 watt Lincoln welder/generator. It was working fine and then the generator quit. The engine runs fine at 3600 RPMs. I have flashed it to make it work quite a few times and worked well until shut down for a day or so, then will have to repeat the process. Now it will not flash at all. I have checked and replaced the brushes and just replaced the capacitor and still no luck. We do not have a reliable repair shop around and I would really like to get this working again. It has a B&S I/C cast iron sleeve engine that is way too good just to trash. Please help and thanks in advance.