The float level can be really critical in one style of carburetor while not so much in another. An example would be the Speedsters and Quads. When running them wide open, as the level in the fuel tank drops, so does the float pin, until it almost disappears. Yet they keep on going till the tank is empty. This carburetor that Monte is asking about is difficult to check the fuel level accurately, and doesn’t have any mechanism to adjust the fuel level. Also the floats often very the size and density. I have some experience running these, and while getting a good seal at the needle and seat can be a challenge I’ve never had and instance where I needed to adjust the height of the float. All that together would indicate to me that the fuel level in this carburetor isn’t critical. Others may see it differently. While this little carburetor doesn’t look to be much I find it to be a marvel of engineering. I have a winter project with the same power head and carburetor. I took it off to make this short video to demonstrate how the choke function works. Notice how passage is reshaped and becomes smaller, increasing the air speed. At the same time the air is directed over the top of the nozzle pulling up the fuel to prime the motor. This carburetor was first used in 1922. I think this was way ahead of its time and one of the reasons these motors were, and are, so reliable. Video link— https://youtu.be/Ev-MzjEfDSE Tubs
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.