ORIGINAL: maxtenet
I thought Perry pumps were only designed for use with Perry pumper carbs. I tried one with a stock carb on an O.S. 40 and ran way too rich through mid range. After looking at their website It seems as though they make regular carbs and special ones for running with the pump. I ended up buying a Perry carb for the pump and it worked beautifully. You may want to do more research if you have running problems when you start it.
Max
I've got a 120AX and the perry regulating pump works great. I had midrange trouble at first, but was shown that I improperly had things setup and that it was due to the pump set too rich. Best thing to do is to tune the engine without the pump, then adjust the pump to the engine.
I asked about the oscillating pump, and perry said it's meant for four strokes and giant scale two strokes, but should work the same so no need for a Perry carb.