I have a 21 year old Snapper Commericial L.M. with a 6 H.P. Briggs & Straton. Since it was my first mower in my first lawn service business, and I've never had any bit of trouble with it, I don't want to retire it! The starter rope recently broke and I had to replace it. However, the new rope, when pulled, won't thread back into the flywheel. I replaced it the same way I took it off, or so I thought. I'm I missing something?? When the casing is off, it will reel back into place, but when I reinstall the housing back onto the clutch and pull, it's like there's not enough tention on the coil to pull it back in. Any ideas??