McFarlane offers two styles of choke control for the dual carburetor Rotax 912/914 series engines:

Turn-to-Lock Style Choke Controls:

These controls feature a turn-to-lock mechanism that requires a quarter turn of the knob to lock or unlock the control at any position.

Go to Turn-to-Lock Choke Controls for more details.

Non-Locking Choke Controls:

These controls do not feature a locking mechanism, however they have an internal elastomer seal to dampen vibration and provide a small amount of resistance. If your choke installation features a return spring, this control will return to the closed position when released.

Go to Non-Locking Choke Controls for more details. 

These controls are not for use on certified aircraft.