I managed to drive over the tow rope this weekend and wrapped it around the prop (mostly just forward of the blades). Going about 5 mph; alarm sounded and engine shut down very quickly. I jumped in and removed 6-8 turns of tow rope from around the prop. Started up again and put it into gear, tried it very slowly at first, but there was no discernable change in sound or propulsion. The prop is attached using the usual Flo Torg for the drive, so I assume that if there was a real issue w. obstruction it would have blown the kit and I would have had no actual propulsion? I looked at the prop (didn't pull it off); everything looked fine from the outside (for what that's worth). I'll be asking my mechanic as well, but want to know if anyone has suggestions re things to look for.