ok i spun the bushin out of my prop today, i thought i got the lower unit but that looks ok my 2 questions are..... 1- the outer shaft seal is blown and leaking oil, is this a seal that i can change myself from the outside of the motor without tearing it open, 2- i have a spare prop but doesnt seem to fit right when i tighten it down it gets very stiff and will not free spin do i need a different thrust washer on the back? also where can i find the differnt front thrust washers all of my props have a different stlye of lock down