Thanks to everyone on prop suggestions. Special thanks to Eric who said my old prop looked a little tired. It is funny how you look at it everyday and don?t see the drastic changes from when it was new. So here is a pic of the old compared to the new. Think the sand and muck I run through ablated away some of the old aluminum? Hope the new one lasts a bit longer than the old one. Stainless should handle muck and sand much better.

Should I expect a 20 or 25 mph increase in top speed from my 15 hp outboard?