Re: prop not turning but engine runs
It is most likely a sheared pin. They are commonly used on smaller outboards. To check it, remove the prop nut and prop. There should be a hole in the prop shaft where the pin goes through. There is probably a piece of the pin still in the hole. Measure the diameter of the pin and the length of the recess for it in the prop. It should be brass which can be bought in 3ft lengths fairly cheap. Cut about 10 of them and keep them in the boat. When they shear again, simply change it on the water and keep boating. If it is steel, nails can be used. I would highly recommend sticking with brass though.