I have a 1984 200es that I have ALWAYS had to change the carb every 2 years (Amazon version)..... Well the other day the bike started running rough and back firing. I pull into the shop and start digging. Not too long after that, I smell the gas and see it leaking out of the overflow tube on the bowl. I pull the carb and open it up. Inspection was clean (some nasty on the bottom of the bowl) and looked alright. I figure why not buy another one. Fast forward to last Saturday.... Install the new Amazon carb and LEAKING OUT THE BOTTOM!!!! My petcock also had a drip when closed I noticed (3/4 tank dripped to 1/8 tank in a week). I ordered a new valve assembly and it is waiting to be put on. Now to the question...... Could a faulty petcock cause your carb to overflow?? I was thinking the floats in the carb control the flow... Is that correct?? Or is there too much fuel dumping in and the floats cannot handle it??? The valve is about 3 years old and it had some crud in the filter. I have to lean towards the valve, but my instinct tell me the floats protect from overflow.
Please shed some light on this!!
Thanks