It’ an aftermarket made by Volrath – Art DeKalb makes other tags for it: Oliver, Mercury, Johnson, etc…. The replacement OMC stand legs that one of our members makes (can’t recall his name but he is at a lot of Knucklebuster meets) fit perfectly. I don’t recall the HP max but it would be the same as the small OMC stands.
RE: The "Knuckle Busters" guy , I believe, is Frank 410-971-0757 Forgive me if I’m wrong, my mind was dazzled by all of the nice brass at that meet. George