Where is it? is it internal or external? / how can i gain access to it without causing too much stress on myself? what would be a good upgrade? and where it the fuel filter???
I've never worked on a Soarer before, but I'll assume it's much the same as an MA70. That being the case, it's an internal pump and you have to drop the fuel tank to get at it. It's not hard to do but a little time consuming. I wouldn't recommend "upgrading" at all unless you have a specific need to do so (eg doubling the engine's power output).