block service parts idle mixture screw part accessible large head style 26- ... 101 idle mixture screw gasket replacement cork gasket pkg 10 ... jet extension design that actually screws into the metering block the main ... metering jet then threads into the end of the extension the installation ... causing a lean condition during periods of hard acceleration or braking 2/pkg 122- ... 5000 warning requires the use of special notched floats to achieve ... metering block has no provision for a power valve both a shiny finish and a ...