Prop Coupling Replacement? Catalina 270

Trescool · #1 (**permalink**) 02-22-2009

I noticed that there was much corrosion on my coupling (?) on the prop shaft of my 1994 Catalina 270. It is kind of chalky/clay-like when I clean it. I assume that is very old corrosion. Here are a few photos of it.
DIOGI - 1994 Catalina 270

Any advice on how serious a problem this is and if it needs immediate replacement? Any other ideas or comments?

Thanks!
Jim

mrwuffles · #2 (**permalink**) 02-22-2009

If your talking about that gray thing you did a close up on for the second pic that would be your zinc to prevent electrolosis. That is a few bucks at west marine.

Trescool · #3 (**permalink**) 02-23-2009

Yes, that (the close up) was the thing I was talking about. I never knew where the location of the zinc was but now this explains much. Thank you!

Rockter · #4 (**permalink**) 02-23-2009

Trescool :

If ever you are looking for it, the propshaft coupling is that device immediately aft of your gearbox where the gearbox joins to the propshaft.