Not sure by your description what it is. Most all the 150cc buggies I have encountered have a vacume operated pump attached to the fuel tank outlet. This will have a vacume line from the manifold and the fuel line which goes to the filter before going to the carb. Now some buggies do not use the vacume operated fuel pump but instead use a petcock. If you can shoot us a picture of what your talking about. TOM
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