I have a 1991 ski doo Formula mx with Mach 1 motor in it, the motor is the same year,it is a 617cc. We got a new throttle cable for it because i bought it without one. When i start it and rev it up it races and the kill switch or key wont turn it off. I would rather not pay a dealer to charge me my college fund to fix it. I don't really know what I'm doing that's why I came here.