Hi, I have a craftsman riding lawnmower that I purchased second hand with the model number 917.275703 listed under the seat. This model shows a mower with a 23 hp engine and a 46” deck however, the mower I have has a 19 hp engine with a 42” deck. The mower has a pto clutch. Recently the blades quit turning. I looked at the deck and the belt is very loose. I noticed a larger spring attached to the bracket on the top rear of the deck. It appears to have attached to the pulley which holds tension on the belt however, the spring had broken and only a short piece of the spring remained connected to the bracket. Since this does not seem to be the original deck I am having a difficult time finding the correct replacement spring. Could someone point me in the right direction to locating the proper diagram or even a part number for the correct spring? Any help or advice is greatly appreciated. Thanks