1970 Evinrude 25. Are there aftermarket props for this motor? The internet searches that I have done shows there are very limited choices, mostly one, the aluminum prop that I have. Without a Tach, I do not know what RPM I am running. The current prop is dinged a little, and bent just a little. My son decided to polish it up and it looks much better. I smoothed out the dings with a dremel and it was an improvement. Just curious more than actively looking. Thanks, Mike