rudder trouble

Well, the replacement rudder won't be used. There is significant crevice corrosion on the rudder tube right where it enters the rudder. Some of it looks like a groove as much as 1/8" deep. I suppose the rudder tube could be sleeved. And, it is pretty thick stock... Reggie

I've seen two different rudders with either serious pitting or evidence of repair from pitting of the rudder tube. the pitting was right where the rudder tube enters the rudder. Inspect yours.reggie