props

[THEFERMANATOR]

Originally Posted by roffey

… now you have me thinking, the lower unit anode is broken off. From what I understand I don't really need it as this is a I/O motor and the boat does not stay in the water, feel free to correct me here. I wonder if the previous owner broke off the anode to put the 15.5 diameter prop on…

Originally Posted by roffey

I think to much... the anode does not interfere with the prop...

To run the larger diameter props MERCURY sells a smooth anode without a fin on it to clear them. And props are available in varying diamters. Larger diamter props tend to be for slower boats that need more blade area for bite at slower speeds. What engine and drive do you have in the boat? The 17 pitch may be a tad big for that size of a boat if it has a small block in it.