I bought a used Ferris diesel 61" mower. The outfit I bought it had installed a brand new engine. But they didn't quite get the new engine positioned right and that resulted in drive pullies being offset. This caused them to overheat and break which took out the deck drive belt too. A big mess really. So, my go-to belt supplier is Vbelt guys with a gal to, new belts fit perfectly and I got the pulleys aligned so we'll see how long these last. I've had a 54 inch mower deck driven by their cogged belt for 4 years now. I was changing the OEM aramids twice a year at 4 times the price. So we doin great so far with the guys and gals at Vbelt!