Originally Posted by stevensuf
I just pulled the rudder to renew the bearings and boats being boats have found two new problems, one is 5mm deep crevice corrosion at the bottom of the stock for about 2-3 cm the other is the rudder has a slight movement speperate from the stock.
So the rudder ive drilled some exploratory holes and determined the bars that runs from the stock have came loose , so need redone.
The crevice corrosion i am wondering if it is ok, to drill/grin back to bear metal the weld to fill and machine to flat again, or should i replace the stock? time is kinda of the essence as its bloody costly , needing to stay in hotel
just now and pay for boat on hard at daily rates..
oh the joys!!!
it is probably not crevice corrosion,it is more likely to be electrolysis
,where the stock exits the hull
what is the diam of the stock?
welding can distort shafts,though i suspect yours is around 70mm at the base.
loose tabbing is more serious and will need attention,though fairly easy to repair with epoxy
and pu foam.
use a fine ss cutting disc to seperate the two halves.
shepards in marina bay should be able to supply materials.
a tip for using 2 pack polyeurathane foam,put comp A and B in the fridge before mixing.
also glassing in the tabs to one side of the rudder moulding will greatly improve the strenght of the repair.