Hello! I have a 1966 Merc 650, sn 2109652. I need to clean the carbs. I took off the support frames, and the starter. It seems to me that the distributor must come off as well. I found a post here from 2003 that says it doesn't. There is one nut on the distributor side of each carb that is impossible (for me) to get to. Is there a special tool made to reach these? Perhaps a way to get at them that I couldn't see? Thanx, Mike