Why would my 50cc Genuine Buddy scooter leak gas through the carburetor?

by Peter
(Warren, RI)

I have a Buddy 50cc (2006) that leaks gasoline through the carburetor. I was driving along and all of a sudden the engine cut out. The carburetor was leaking substantial amounts of gasoline.


Actually it drained out completely in the end. I took the carb apart and had a look at the floating assembly. It looked okay: the hinge pin was in place and not wedged, the float (plastic) was fine and the rubber-tipped stopper was still properly attached to the floater and fit in the small shaft without wedging.

All parts moved without friction. So I put it all back and attached it, poured in a pint of petrol and started her up. Within 20 seconds, the carb leaked a substantial amount of gasoline (approx 10 drops per second).

What could be the issue here ? Thank you for any help you can give me. Be well, Peter

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Jul 26, 2010
It's the tiny stopper !
by: Peter

Okay, with the help of a friend living 6.0000 miles away, we came up eventually with the very unlikely reason why the carburetor kept leaking.

The stopper of the floating assembly needs to reach tightly into the small shaft or it won't cut off the flow off petrol. In my case, the stopper didn't push all the way up to cut off the flow. Why ? The tiny pin on the stopper itself had come lose and slipped back into the stopper.

The pin on the rubber tip stopper is not a solid part of the stopper. It is a separate pin wedged (!) into the tiny cylinder. With a pair of needle nose pliers we were able to grab it and pull it up by about 1/6th of an inch until we met with resistance and the pin wedged itself tightly again into the cylinder.

With the stopper pin's original height now, when the floater moves up, the stopped reaches all the way to the hole in the shaft and cuts off the flow of petrol. It may be advisable to place a drop of epoxy glue around the tiny pin to keep it securely in place for the long run.

Here's a picture:


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