Fuel Pump a bit suss?

[andy]

I've just put a new fuel tank in my FB (the old one had rusted out. It's not a great fit as it was an EK tank, so if anyone has a tank in the Sydney area please e-mail. Anyway I think the fuel pump could be a bit suss but not sure if it is a leak in the circuit (Does that matter) or could it be worn out? How do you tell?  Any sugestions appreciated.