If the cable is broken or frayed, you'll need to replace the cable. Go to www.SearsPartsDirect.com
and enter your full model number.
If the model number is 247.290000, here are all parts and diagrams on Sears PartsDirect: searspartsdirect.com/model/1p9lfk46im-000247/craftsman-247290000-rear-engine-riding-mower-parts
How to replace a blade clutch cable on a riding lawn mower DIY repair guide: searspartsdirect.com/diy/repair-guide/how-to-replace-a-blade-clutch-cable-on-a-riding-lawn-mower
For engine parts, click on "View Engine" above the parts diagrams. For help with parts, call Sears PartsDirect at 1-800-366-PART. For repair at your home, call Sears Home Services at 1-800-4-MY-HOME.