SEI MARINE PRODUCTS- Mercury Mariner Force Shift Bushing 23-43052A 4 50-150 HP 2 Stroke 4 Stroke This shift bushing replaces OE#: 23-43052A 4 and fits Mercury, Mariner, and Force outboard lower units with the following applications: Mercury / Mariner / Force 2 Stroke Inline 3 & 4 Cylinder, Metric 50-125hp 1987-Current, and 4 Stroke 50-150hp.