The seawater in the powerhead is hot and the water flow would keep the surface fresh for more corrosion.
My dealer had nothing to gain.
He predicted the corrosion before we pulled the powerhead off. Previous experience?
The corrosion was massive and the anodes were only mildly corroded.
We were going to patch the water jacket but the engine mounts were beyond patching and had already cracked.
I don't have a problem with stainless props as I no longer own one and never will.