There’s a ton of information on the web..
Kiki made 2 versions of that pump..
1 w drain and full screws.
(1above the other)
&
1 w/o.
The oil amount is 5oz.
U can add oil thru the top of the governor..
The pump body has an overflow pipe on the back of it.. any excess will flow out of the pipe while running..
Or
U can loosen the screws on the governor cover and pry back on it..DO NOT TAKE IT OFF.!! There are springs and shims that will get lost..
Be careful prying it back.. there is a gasket that seals that area..
Do a search and you’ll find a pic of the drain and full screws.