Bought a new drive belt. All the research seemed to lead me to a 5L-820 after fitting, seemed a 5L-830 fit better. (840 was a tad long) Problem : Wont stop when you push the clutch in. And I'm a little to old to be tamin run away horses ! Even with the belt off the idler, it wants to grab at the engine pully an GO. Old belt is perty slick on sides, do I just need to drive it around some ? Tractor hasn't been worked for several years. Maybe pully a little rusty ?