My mom's boyfriend got a pressure washer from us for his birthday... I went to use it yesterday night to finish washing the jimmy... Filled it up with gas, put the garden hose on along with the pressure hose and gun. Turned it on and there was 0 pressure. What would cause this? There is lots of pressure coming from the water hose, nothing blocking the water filter, nothing clogging the hoses as far as I could tell(blew through them) and no SERIOUS leaks... Anyone?