T-H Marine Steer Stop Outboard Hydraulic Steering Lock Set - 4" [SS-3-DP]Steer Stop Outboard Hydraulic Steering Lock Set 4" T H Marine developed the first steering stop available for outboard motors and now we've revised that design so it stands apart from imitation and performs better than any other on the market. With our 4" Steer Stop Outboard Hydraulic Steering Lock in place, boaters can center their outboard motor equipped with hydraulic steering and keep it from wandering when trailering. Similar to the original