How are you jumping the solenoid? If jumping the trigger post to the battery lug (tiny lug to the battery lug), then the solenoid is ok.
If you're jumping the two big lugs, you've only tested the starter and starter cable basically.
Put a test light on the starter interlock post (the small post at the top of the solenoid) and crank the engine. The test light should illuminate. I bet yours doesn't. If it doesn't, you know the issue is before the solenoid, namely the clutch safety switch, ignition switch or interlock wiring. The CSS is the place to go next (checking in/out voltage).
Good luck.