I`m very new to reel mowers but i bought my first one. I believe it is a Morrison Olympic 500, i came to this conclusion from a previous post which had a PDF of the parts list. i looked over the 400, 500 and 600 and the 500 is the closest match. I have an issue with the clutch not pulling the mower when i engage the clutch handle. What could be this issue? In the photos i am pointing to a bolt, should this screw into an internal thread of the clutch plate mechanism with the external thread, that i am pointing to with the screwdriver? I`m also buying a new clutch cable as the old one is shot. Thanks in advance for any help.