I just bought my first boat and I'm told from the previous issue is a clog. I've taken apart what I can to get to the water pump and the impeller but I'm stuck, I can't drop the lower part to gain access to the impeller to check for any problems. I have a Evinrude 1964 60 HP Model VXL-10S. My other problem is I can't find schematics. I've taken off the bolts but the lower half wont drop, and without schematics I cant see where to go next.