870 2006 fuel lift pump

[akwman]

I checked the relay , its good . The unit acts like it has lost prime . I can not get the lift pump to get going , I played with the plug / another relay got it to work weakly sounding for 7 seconds , I heard it start to strain . It then quit . So my question is how long should it take me to change out the pump and what might I need to complete the task . Yes I have the pump and the gasket . All pointers appreciated .