I installed the napa brand and its brand new, the starter I just took off was fine too. I'm not getting any voltage at the solenoid positive while cranking.
What I was trying to say is that I had two leads going from the jump pack to the starter solenoid and the larger positive lead then ground the jump pack to the exhaust bracket.
When I did this is made a brief noise then just stopped, no noise or movement from the starter.
I know the starter is good