Mast Compression Post
A very weak link for the 30 Catalina is compression post decay. The stepped mast sits on top of the deck on a plate supported by a compression post noted in the bildge and upward. Take a look at the door to the head. Is is hard to close? Rubs against the upper frame? Is their signs of a slight indentation under the mast on the deck? If these show up, the mast compression post has been slowly rotting away and is weakening.
The late Mark II model (19881/2 - on) had a factory change in the compression post. They went from fiberglass covered wood to metal to remedy the problem. There is a site on "fixing the compression post", but it can be an expensive fix and a possible deal breaker if the yard is going to do it. I am not sure what the cost would be since its alll labor (someone chime in please), but pricey. You have to drop the mast, dig out the post from the bildge up, install the metal support and maybe repair the deck and restep the mast.
To me, this is a key surveying bullet on the Catalina 30, especially if your looking at the older models.
Next is the infamous "smile" when the keelbolts rust and the rust weeps through the fairing material between the hull and keel. This area would split open over time and a "smile" would form along the fairing line. Its ugly if you can imagine rust leeching from the smile!! Catalina went to stainless keel bolts, but I am not certain when. I know my 1988 Model has the stainless bolts. This is something you might not see when diving the boat as the "smile" could be covered or blended in with bottom growth. This can be an expensive fix as well as the keel may have to be removed to repair the damage, newer stainless bolts inserted and fairing material applied.
With any vessel you buy, NOTHING beats a thorough survey by a competent surveyor, especially one that knows the Catalina 30. Do not go on a "dive" alone to establish hull, keel and rudder condition. The vessel MUST be pulled pressure washed and thoroughly inspected.
With patience you'll have a wonderful and worthy vessel and the Catalina 30 is a great vessel to own and operate.
Best of luck
Bob
Breezin II
1988 Mark II
Georgia