Check fitment before purchasing. Works on some Chrysler Outboards - 70, 75, 85, 90, 100, 105, 115, 125 & 140. Force Outboards - 70, 75, 85, 90, 100, 105, 115, 125 & 140. Mariner Outboards - 75, 80, 85, 90, 115, 135, 140, 150, 175, 200, 220, 422, 628, D28, T21, T28, T28S, R21, R28, R28S, RL21, RX28 & RX28S. Mark Outboards - 30 & 30E. Mercruiser Inboard Engines - 340, 7.4L, 5.7L, 8.2L & 5.0L. Mercruiser Sterndrives - 120, 140, 470, 485, 575, 530D, 636D, 320 & MC1. Mercury Outboards - 4, 75, 80, 85, 90, 115, 135, 140, 150, 175, 200, 220, 225, D28, T21, T28, T28S, TH, TH+, R21, R28, R28S, RL21, RX28 & RX28S. Mercury Race Outboards - 2.4 & SST140. Motorguide Trolling Motor - RL21, R21, R28, R28S, RX28S & T21. Sea Ray Boat - 135 & 175.