Quik13,The trim tab on a Mercury you will not ever notice being there. It does not play in the process of torque with a bass boat and a Mercury, whether it has hydraulic steering or not. There are other brands and set ups that it will, though not on your rig. People ask where it should be set, and we tell them to loosen the bolt remove the tab and throw it over you left shoulder as you will never miss it since it is not in effect.