Thta's the one that came on my Burro
. The rubber diaphram was split ( from age or freezing I don't know) but I was able to get the rebuild kit for 20 bucks and all works well now.
Actually once the prime is made about 4 or 5 pumps, water is always there on the first pump. If that's not the case then maybe you have a leak in the line or the diaphram.
Sometime holding your thumb over the spout while you pump will help you get better suction to prime it.
City water is obtained by just pressing down on the handle.