If anyone is interested...I have digital pictures of my process of tearing down and rebuilding 50hp merc 500 4cyl. I have done everything except for tearing apart the powerhead. From the lower unit up. Including carbs, dist, magneto, starter, wiring etc... just let me know by e-mail, or if the admin has a spot here on the page I think that it would be a great learning tool for those who are doing the same thing. That way when someone is trying to explain something or show a part they would know exactly what it is. I noticed that the pictures in the manual (Seloc) are not very clear or precise. So let me know all and I would be glad to help out.