Can the float, needle, and seat be serviced without removing the carburetors? It appeared there might be access by removing the starter/solenoid and working from the side?
The primer bulb won't get hard and the top carb is leaking fuel out of the air inlet. I suspect the float has an issue. I would pull the carbs but some of the wiring is so delicate i want to minimize moving it.
I plan to repair all of the issues if this motor proves to be worth my time. Since it wouldn't restart after I found the leak I am not sure if it may have developed another issue. Right now I need to repair the top carb and hopefully it will restart so I can properly test the water pump. Then I can test to see if it will run properly above idle. Once it passes those tests hopefully there won't be any water in the lower unit. Since I only have a couple of hours a month to work on it I have to make it count.