Mechanics from marina said it was getting fuel, but it still won't start. It runs for a few seconds, then shuts off. They called the Seattle Espar guy and he said it was probably the computer board, which is no longer available. When the mechanics first worked on it they got it started after several cycles, it then blew out a thick cloud of smoke and worked. It worked for me the next day...once. Any notions? I'm not willing to put $3-4K in a new heater.