how was the pin installed when manufactured? was it pressed in from the outside in? or inside out?
it is pressed in from the outside of the body, then the pump body is crimped around the pin basically..
ive always had to drive the pin all the way in, against the governor shaft, taken my dremel, removed the excess metal from the boss that holds the pin in, then pushed the pin flush with the inside of the pump body..
then clean everything up really good, and seal it up with some clear quick-set high strength clear epoxy. ive done this to atleast 4-5 pumps now, and its worked every time, and not a single one of them leaks..
if you want, i might be able to dig up some pics, and show you exactly what im talking about with the boss needing material removed?