im wondering if all the stuff getting past my air filter is already past it? i cleaned out my cab yesterday(it was hard to start) and i stuck my finger in the air boot thing that leads from the airbox to the carb and when i pulled it out my finger was covered in dirt and things. my problem is one of the screws holding the air box on is stripped out. like it was over tightened and wont come out!! would bolt cutters work?