Bonanza 52" Throttle-Mixture Vernier Control Cable Assembly. Beechcraft factory new cables. To ensure a proper fit, order new cables based on the length of the current cable in inches as measured from the back of the spacer that sits in front of the panel to the tip of the threaded end of the cable with the cable fully extended (push the knob end of the cable in as far as possible and measure the length from the back of the spacer). Throttle and Mixture Cables will typically measure approximately 48, 52 or 54 inches. Only a limited number of aircraft used the 50" cable.