Use a float level gauge and measure the distance from the carburetor body to the float arm - The correct float level is 7.5mm(0.30in.)
It is in the float chamber of the carburetor.
Bend the tab that contacts with the "needle". But DON'T put pressure on the needle when you do so. Carburetor rebuild instructions that come with the carb rebuild kit will tell you how to adjust everything and give optimum float level settings.
The base settings for a Mikuni carburetor typically involve adjusting the pilot screw and float height. The pilot screw is usually set around 1 to 2 turns out from the fully seated position, depending on the specific model and engine requirements. The float height is generally set to about 20mm from the gasket surface, but this can vary based on the application. Always refer to the specific manual for your carburetor model for precise settings.
To adjust the carburetor float on a 1990 Isuzu pickup, first, remove the carburetor from the engine and detach the float bowl. Check the float height by inverting the carburetor and measuring the distance from the float to the gasket surface; it should typically be around 14-16 mm. If adjustment is needed, bend the float arm gently until the correct height is achieved. Reassemble the carburetor and reinstall it on the engine, ensuring all connections are secure.
The float is located inside the carburetor.
To replace the float needle and seat on a Tecumseh carburetor, first, remove the carburetor from the engine and disassemble it by taking off the float chamber. Carefully detach the float by removing the pin that holds it in place, then take out the old needle and seat. Install the new seat by pressing it into the carburetor body, then attach the new needle to the float and reassemble the carburetor, ensuring all components are properly aligned and secured before reinstalling it on the engine.
Have you checked to see if the float has a hole in it allowing fuel to weight it down? Possibly the needle valve is sticking and not the float. Could also be the float needs adjusting. You need to open the carburetor up and see what is going on.
Almost All engines with a carburetor have a float valve. The exception is a carburetor Built by Tillotson, horrible things but they worked upside down.
A bad, stuck or dirty float needle inside the carburetor.
Float may be sticking or have a hole in it.
98 Dodge van does not have a carburetor-it has a throttle body= no float