Can anyone tell me if itis normal for a stainless prop 19 pitch to show rust, pitting, and cracks , that is only 6 m0. old ?The boat is pulled after every trip and washed, along with prop. This prop has only been in salt water 8 times in the last six mon. and they have been day trips only, boat has been pulled after each trip.
No, it is not normal. Sounds like you got a bad batch of 304 stainless without enough nickle in it. The cracking is chloride stress cracking and will come apart on you and cause a very bad day indeed.
I see rust on Stainless props all the time, especially ones that are not polished. The pitting would could be from cavitation. Cracks I would consider a problem. What brand is the prop?