Buddy's M1000 Turbo ran fine for the first hr, he shut it down and would not start again. Pulled and pulled and lights would not even light up, he could not check spark because we had nothing to pull the springs on the pipe. After 2.5 hrs of sitting it started, ran great. Went back to the trucks and it restarted everytime. He noticed his sled was flashing CU 6, and help would be great