I just had this problem sunday i just switched from a i/o to an inboard. Tied the bags like i normally did on my i/o trolled for 3 hours. Then my motor stalled and my shifter was stuck. You may have seen me getting towed in around 11:00. I was next to a can. Now im praying my shaft is not bent. I have to put some new packing in then ill see if shes bent.