Dismantled my 3,5cc last autumn and are now, slowly, putting it together again. Bought some new and reusing some parts.
Just fitted the tank with a float chamber. Now the question, the float chamber has three connections, two on top and one at the bottom. The main tank has two. I should be able to figure this out but...
No 1 from the main tank to the top of float chamber (main inlet).
No 2 from the main tank to pipe (for pressure)
The bottom, on the float chamber to carb.
Third on (top) float chamber is return from carb?
Correct?

FSR-O, and the engine are a CMB Valvola (3.5cc)
Feel free to attach a picture of tubing in your boat(s).