Sometimes when the engine is warm the engine will not start for a few minutes. I have replaced the fuel bulb, but have not had it out since. I replaced the bulb because it would go soft in a few minutes of sitting. It will always , but sometimes will not start. I have also noticed that at times, some of the electronics onboard don't work at times and then they do. Is it possible that the engine is getting starting power, but not ignition power? The engine has run as long as 12 hours without stopping with no problem. 