My 64” snow blower stopped rotating in about 2 seconds, 5’ mower stops in about 2-3seconds. I don’t now how much wear on clutch, but I just don’t like it working that hard. Maybe I am over thinking it, lolI like the idea of an overrun clutch. It definitely saves wear on the pto brake. You have discovered that the ones at tractor supply don’t work on modern pto’s
They are for the old ones where you drove a pin through.
I just got one for my 4720 last week after hunting around for a quick release one. I actually started a thread last year about getting one (I better update the thread).
This is the one I got:
It is good for 100hp, but they have smaller ones that are significantly cheaper.
Amazon.com: Heavy Duty Quick Release PTO Overrunning Clutch, 100 HP, 1-3/8 x 6 Spline : Patio, Lawn & GardenBuy Heavy Duty Quick Release PTO Overrunning Clutch, 100 HP, 1-3/8 x 6 Spline: Replacement Parts & Accessories - Amazon.com ✓ FREE DELIVERY possible on eligible purchaseswww.amazon.com
I used it for the first time last Sunday and it worked great! The pto on the tractor stops right away, and the mower keeps turning for about 5 minutes.
Used to take about a minute to stop, and I know the pto brake was taking all that abuse to stop it.