OMC 0987670 987820 915273 Cobra V6 V8 Lower Unit Gear Set 800 1992-1993 350 351 Flywheel You can note the differences

You can note the differences in length where the shoulder is by looking at the last image

Transfer Cover Assembly: 99522

1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990

3L V6 1991-1997 (because the 1998 & UP ones had threaded ends so that you could install a brass elbow for the newer style cooling systems

0L 140hp Engines 1968-1982 (basically before everything switched to the electic chokes in 1983&up)

OMC 0987670 987820 915273 Cobra V6 V8 Lower Unit Gear Set 800 1992-1993 350 351 Flywheel You can note the differencesItem Details OMC 987670 0987670 Forward Gear & Pinion Set (1990 1993 Models, but specifically 1992 1993) Replaces 986656 0986656 (1990 1991 Models) Stamped 987820 Forward Gear (Pinion not stamped) OMC 915273 0915273 Reverse Gear (1992 1993 Models only) Stamped 915273 This entire set would be most of OMC 0986974 with the exception of the 914714 clutch dog which is intended to be used with this set. Compatibility Would have been found on the larger OMC