BOUND_4_HELL

Thanks for posting this info, it is quite valuable. However, at slight correction is needed in the 1.7MM measurement, it should be .067" not 1.067".

Chuck

The height of the Metering Lever on any diaphragm carburetor is critical for controlling when and how far the inlet needle 'pops' open, thus configuring the engine's acceleration characteristics. If the Metering Lever height is set too high, it may create a rich condition, while a Metering Lever set too low may create a lean condition. The height of the Metering Lever must be 1.7 mm or 1.067" (WG carbs) and 1.45 mm or 0.057" (WB carbs) below the edge of the carburetor body. Walbro sells a calibrated brass plate gage to be used as depth meter (Walbro item # 500-13-1) available through most power tool shops.