Bennett actuators are strong but flexible nylon/ fiberglass hydraulic cylinders. The piston like arms push tabs into position. Fluid flows through a concealed hole in the upper hinge at the top of the actuator, thus eliminating external hoses subject to damage
I have never had to replace these before. I have one stuck.. How dow I know which ones to buy? 2002 Rinker Captivia 272?
This might not be the actuator. It could be a solenoid or pump. Here is a link to the Trouble Shooting Guide by Bennett Marine: