MerCruiser Lower Unit Gearcase Gear Set Carrier 43-878087A4 Alpha One 1983-1990 Transom Plate There is a broken off

There is a broken off screw in one of the holes that will need to be removed

If you are unsure on compatibility or if this will work for you

Years:  1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 19801981 1982 1983 1984 1984 1985 1986 1987 1988 1989 1990 1991 1992  (and possibly others)

From my research it seems that this might be compatible with other Yamaha 4hp 4-stroke outboards 2000-2006 & newer

3LX 175 185 198 200 205 228 230 255 260 300 320 330 350 370 4

MerCruiser Lower Unit Gearcase Gear Set Carrier 43-878087A4 Alpha One 1983-1990 Transom Plate There is a broken offItem Details MerCruiser Sterndrive Alpha One Lower Unit Complete Gearset 43 878087A4 (Pinion, Forward, Reverse) Used in MerCruiser MR & Gen I lower units 1983 1990 These are the correct gears if your lower gearcase DOES NOT HAVE A PRELOAD PIN on top of the driveshaft ****If your gearcase HAS A PRELOAD PIN, then these are not the correct gears***** If you are looking for a 1970 1982 Gearset please contact me and I should be able to help. Pinion Gear