Which isn't the newest thing around.

It's an old
Lawn Chief it has a Briggs motor and it has a label of General Power Equipment company on it with model and date codes on it which I assume is the manufacturer.
I've been searching and can't find anything on it or the motor.
The motor is a Briggs and Stratton model 93882 type 3118 the rest is rusted to being unreadable.
Is there an old lawn mower website? I'm sure this thing is no longer being supported by a company, if it even exists. Or any idea how to find a manual?
btw what size is a spark plug socket? Do they come gapped so they work for everything?