I have a 30 HP 2 stroke tiller engine. I used the boat on Sunday and had no issues w/ the reverse. However, on the way back to the ramp, I ran too shallow during a slow idle causing the motor to stop. I poled out of the shallow and started it and ran forward to the ramp w/ no problem. After flushing the motor, (it was off) I noticed that the lever would not go into revese. I couldn't push it back into reverse at all. No issues w/ forward and neutral. Somehow I thought to turn the prop. After turning the prop, the lever went into reverse. However I noticed that sometimes, the lever would go easily into reverse, other times it wouldn't at all unless I slightly turned the prop. I haven't had a chance to run this in water to see if I would have problems getting it into reverse while in use. What would cause this issue? Thanks.