Thermo quad float bowl adjustment

Post #18.
Wrong float level. Not surprised it is rich, smelly. 1" or 1 1/16" for brass floats.

Another problem that can be hard to diagnose. On the main body, under the pri jets are two black 'cups'. Held in place with white epoxy if original. These can leak if handled roughly. This then allows the corresponding cavity in the base plate to fill with fuel. This gives an overly rich mixture as the throttle blades are opened because this fuel is added to the fuel that has come through the pri jet.
Fix is simple & should be done as a precaution when rebuilding these carbs. Using a Dremel, hacksaw blade or file, grind out a recess where the white epoxy is. Fill with new fuel resistant epoxy.