Well, the engine wants to start now by flipping the prop but it seems to want to start backwards on some flips and throws the prop hub lose. I need a hub that I can use the keyway in the shaft with I guess. I tried locktight and backing a nut up against the hub but it still comes lose after a few attempts and I don't feel it would be safe to let the thing run this way so I have contacted Scott at Brielli to see if he can supply a hub. To be continued.....