I have a 1986-7 Mercury 25hp that I have been working on. Had issues with flooding out the carb and found hole in float causing in to sink in the bowl. New float and solved that problem. Take it out and now will bog/decelerate at WOT. It'll run mid throttle fine and run WOT for about 5 seconds...
I just got a new to me Mercury 25hp which i believe to be a 25xd trying to located a serial number as well. The throttle cable that connects at the end of the tiller going under the hood feels very stiff and difficult to twist. Also frayed at the connection. Have taken the boat out motor seems...