Possibly wrong section but in any case, you should have no problem running a turbine fuel pump with a brushed motor using an ESC designed for brushed motors and a servo tester would work with that ESC. Don't do this if you're actually firing up a turbine - Without RPM and EGT feedback to the pump speed that will likely result in flames, a lot of noise and the imprint of the pieces of the former turbine engine's rotating parts on objects in the near vicinity (including the operator if unlucky).
If you just want to test that the pump is working, you can use a NiCd receiver battery (4.8v) or even a single AA battery should get it spinning. Remember they don't like running dry for any length of time.