They changed to a Warner a while ago.
You need to look at the clutch, it will say Warner right on it, on a small tag.
The Ogura clutch is shaped like a triangle on the bottom, with adjusters on all 3 corners for air gap adjustment.
The Warner is round on the bottom (looks like a small bell) and has no adjuster on it. It also has a wire pigtail connector on the bottom (quick disconnect).
If you have any other questions let me know, I would be more than happy to answer your questions on anything related to your purchase or maintenance of a Hustler product.
Hope this helps
Pj