A boat prop is an essential part of the boat such that the performance of the boat depends on that only. There are several propellers available and one can choose according to the requirement. The propeller can get repaired at any time; therefore, you should carry a spare propeller whenever going for boating. Now, when you come to know that your propeller has encountered some problem, you should make some precautions. The sharp edges can injure your hands. Just observe the arrangement of the already existing propeller. This may help you during replacement of the new one.
Source: Underwater prop repair