The Gemmer is adjusted in a similar fashion to the Burman.

At the top of the box you will find a screw with a 19mm locknut. One loosens the locknut and adjusts the play out with the screw and then re tighten the locknut. PLEASE READ ON.

WATCHPOINT!!

The box must only be adjusted when it is centered dead ahead. When it is properly centered you will detect find a single adjustment point which has less play.

You determine this point by detaching the steering and moving the arm until you feel the slightest hint of resistance at that special point. You then can adjust the play out AT THIS POINT ONLY.

It is a feature of the Gemmer box that play increases the further from this center point one turns. That is how they are designed and if you attempt to remove the play at another point, you can cause damage to the box or inhibit your steering.