Im having a problem when i run it wide open sometimes it will automatically shift into neutral and the motor will rev up wide open. It doesnt do it all the time just every once in awile. Other than that it runs great. I can run it 3 or 4 days here and there and it does fine then all of the sudden out of no where it will shift into neutral. Cant figure out what maybe causing this. Any help would be appreciated. Tks.