Problem with this generator. It starts and run with the start button held down and when you release it runs for five seconds and dies. Per the troubleshooting guild lines I have checked the oil pressure and high oil temp. they are okay. I even brought a new motor control board 168$ AND NO RETURNS still have a problem. the next step is the computer board which I can not find but will cost 300$ plus.....anyone has ideas or what could I replace it with.... 1996 model..thanks