I have a total of 4 ( 1 my mom's 1 my sister's 1 is mine the last one is a spare ) of these toro ryder mowers and 3 of the 4 have the same problem. 2 of 4 I bought new other 2 bought used. Going through my mom's replacing everything but the problem is the belt for the engagement for the blades. I've replaced cable, pulley, new belt, new main spring all bearing in deck are good. The belt is Toro and correct part number on the belt but it just seems loose so I'm going to get a belt that's 1/2" shorter belt. Just wondering if anyone has any ideas that i could be missing. I do know these inside and out but almost 20 years old.