Howdy:<br /><br />I have a 1956 Mercury Mark 55 I plan on restoring. I noticed that some special tools made specifically for this motor are used to work on the lower unit and water pump. Can anyone tell me if these tools are absolutely necessary? Do I really need these tools to work on the lower unit and water pump? They are no longer available, I have come to find out, and some folks are charging absolutely OUTRAGEOUS prices for some of them on ebay. I'd like to work on this engine, but I don't want to break the bank to do it.<br /><br />Any comments from those who have worked on the old Mark engines will be greatly appreciated. Thanks in advance for your replies.