To bridge the solenoid, I just use a rubber handle pliers and touch the two large lugs. It should spark and turn over. If you don't get any where with that, check the starter connection. If that looks OK, pull the starter and hook a jump pack to it. Black to the case and then touch the red to the lug. It should turn good. Also try this test holding it at different angles. Yes I have had starters only work if held level and stop as soon as you tip it a little.