i just finished taking the flexshaft out to lube it.what a nightmare.setscrews were a ***** to take out,finally got them out,and when i went to run the boat this afternoon,i started the boat,then i noticed the collette loosened off and the prop stopped spinning.i have since retightened the collette,and about to run it.anyone ever have this problem with the collette loosening off,even though it was tightened properly?