You can find parts, diagrams, and your owner's manual on Sears PartsDirect: searspartsdirect.com/model/4o5vj2eqmc-000247/craftsman-247289800-front-engine-lawn-tractor-parts
On page 20 of your owner's manual, Figure 11 shows the Deck Idler Bracket and the idler spring, and where it attaches.
If you need technical support, you can call 1-800-800-7310. You will need to select the following prompts: Press “1” for English, enter your 5-digit mailing zip code, press “3” to speak with a live agent, press “2” for our technical department, then press “3” for maintenance and repair.
If you need a repair at your home, you can call Sears Home Services at 1-800-4-MY-HOME.
Hope this helps!