OMC Outboard Marine Model 400 & Cobra. 4 1/4" Gearcase
Thru-Hub Exhaust and 13 Tooth Spline
2.3L Model 400 (120HP) ... Thru 1991
2.5L Model 400 (120HP) ... 1978 - 1984
3.0L Model 400 (140HP) ... Thru 1989
2.3L Cobra (128HP) ... 1988 - 1991
2.5L Cobra (120HP) ... 1985 - 1987
3.0L Cobra (140HP) ... 1985 - 1987