Hi I recently bought a used lawn boy 10696 with a HONDA GCV160A RTL1 engine. After one cut I started hearing a loud metallic Clank at first I thought it was the electric start motor hitting the flywheel teeth however after taking off the starter it's still continues to make that noise when going through thick grass. I've noticed that the blade moves with a little bit of force up and down and I believe the blade is contacting the deck. What would cause this and what do I need to check? Is it possible a bearing that is shot? Thank you for all your help and answers.