Hello I am new here and need some help. I have a Duro Max 10000 generator. Its 2 years old runs like new but when I start it up the unit produces power but after a few min. The power stops. The voltage meter reads 220 amps at first but like I said after a few min it reads 0 and doesn't put out power. Please help. Its the only power supply to my food truck and I need power fast.