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... if you use the .188-inch pump discharge ball in the throttle pump check ball location, the ball gets stuck down there. When the offending party tries to pry it out, he can't get a tool around the radius of the ball and it gets stuck tighter--even a magnet won't get it out. The good news? These carbs have very fine veins all through them, so if a ball gets stuck, the carb body's external access veins are your saving grace.