Re: Free 816 But I'm Mechanically Illiterate!
I haven't had any Briggs powered tractors, so I don't know what you would have had to remove besides the screen. The flywheel is still in place though (it has the cooling fins, and is gears around it's circumference. That's the thing you would need to use a puller on if you ever needed to remove it.
As for the starter Bendix, again, not knowing Briggs engines, I can't say exactly where that retainer clip would go. It does look like the starter shaft is threaded it the end which would mean that a nut, or threaded cap should be threaded on. I have to wonder if the retainer clip may be for a different starter.
Also, with the circular metal part in that position, it looks like the starter gear wouldn't be able to fully engage, or mesh with the flywheel gear. Hopefully somebody with a Briggs engine can clear this all up for you.