Fixing a loose guard

[Ron]

The big guard (part 5) has become loose and I'm wondering where the screw(s) are that would tighten it back. Is it part 50, the single screw that is inserted from underneath the guard? Is it just one screw? Do I have to take the spool out to see it?
Thanks

[Kevin]

Just the single screw and you can see it without removing the spool - just clean away the grass on the underside of the guard.