So we took the prop off and inspected it and it appears to be fine so we reinstalled that and it runs smooth again. I think the hit knocked it out of alignment on the shaft...won't know for sure until on the water.

We tried adding some additive to the transmission case to potentially free or assist any stuck plates but that did not to help.

The boat still dies in reverse but if you eliminate the linkage at the transmission the boat can throttle into reverse just fine. So the issue is isolated to the transmission it seems? Why would it die in reverse...would that be just because the plates are seased up? Is there a kill switch that kills the engine if the tranny is locked up?

Do these issues sound like the tranny is shot from an aggressive prop strike while throttled?

Is there anything else that can be looked at to hopefully not having to rebuild the clutch?