Splitting the carbs to replace the plenum seal and O rings is a good idea, but I believe you still have a leaking float valve or a split / porous float (take them out and shake them to check for gas inside). It's also possible that the float is sticking open when the bowl is refitted, due to it fouling on something and not being able to close.dwight007fchr wrote:I need some suggestions regarding this leaking carb:
I checked all the carb float valves and they were working fine. I had the bowls off with the carb up-side-down (as in picture above) and blew into the gas line (put a bit of air pressure into the line) as I moved each float upward to its "open" position. When I did, I could hear the air begin to hiss out of each of the float valves. As I let the float go back down, the air stopped. So, they are all working fine based on air flow.
I then put the bowls back on, and flipped the carb right-side-up, and attached a long piece of gas line and used a bottle to add gas to the line. The carb bowls filled up, and then carb No. 3 (the one where the fuel line connects to) began to leak gas. The gas was flowing below the butterfly and dripping out the end. It was also leaking out of the brass fitting (in pic at tip of my finger), and also appeared to be leaking higher up around the carb.
It was only leaking around the No. 3 carb until I put a screwdriver under it to tilt it some. Then, gas also leaked out of Carb. No 1:
Here you can see alot of gas sitting in the main air box chamber, right beside Carb 3:
I hope to get some advice as to what could be causing this big leak. I believe the float valves are working fine. Is there something else that could allow the leak assuming that all the carb float valves are closing properly?
Maz