I recently purchased a 2000 Sea Ray. A new 4.3 was installed by a marina last winter by the previous owner. I am in the process of changing out the bellows, shift cable and other maintenance items and decided to check the alignment. Using the Merc alignment tool, I can only insert this partially. Looks like about 1/2 inch into the splines. When I tested the boat everything seemed fine and the stern drive came off easily enough. I read all the alignment posts so far and I have 2 questions. None of the posts talk about horizontal alignment. That is, all the adjustments are to raise or lower the front of the motor. Why is a side to side adjustment not mentioned? Second question is where do you start with the alignment if I cannot get the tool in enough to see where it is off? I am new to this forum, boating and certainly boating maintenance but I have a lot of automotive maintenance experience. Any help would be greatly appreciated.