Exactly. It has to either pivot or slide or it just won't work. The angle of the actuator has to be able to change as it moves. That's why the comment of it being fixed at the transom attach point confuses me. Maybe his bracket is just really tight on that end and he thinks it doesn't move. Take a picture of the top side on the actuator where it mounts to the boat. Bet there is a pin in it.

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