Yikes!!! I would not want that spinning open net to my foot!!Hit a bump last weekend and the outlet shoot fell off. Bit scary to finish the yard with that spinning next to me, so it's parked until I get around to doing something (or just replace with the other mower I just got).
View attachment 29308
If you have good metal, yo can weld up a cover, with some angle steel for support.
But I'm betting the further you go toward the center of the deck, the worse the rust rot is, so probably nothing decent to weld onto.