OMC UPPER AND LOWER GEARCASES | Home | Index OMC STERNDRIVE GEARCASES DRIVE ASSEMBLIES OMC COMPLETE DRIVE ASSEMBLIES HORSEPOWER DESCRIPTION YEAR DETAILS & NOTES 120 & 140 4 cyl. Elec. Shift 1966 thru 77 Low profile 120 & 140 4 cyl. Elec. Shift 1966 thru 77 Low profile T/C 155 V-6 Elec. Shift 1966 thru 77 Low profile 155 V-6 Elec. Shift 1966 thru 77 Low profile T/C All V-8 V-8 Elec. Shift 1966 thru 77 Low profile All V-8 V-8 Elec. Shift 1966 thru 77 Low profile T/C 120 & 140 4 cyl. Elec. Shift 1966 thru 77 High profile 120 & 140 4 cyl. Elec. Shift 1966 thru 77 High profile T/C 155 V-6 Elec. Shift 1966 thru 77 High profile 155 V-6 Elec. Shift 1966 thru 77 High profile T/C All V-8 V-8 Elec. Shift 1966 thru 77 High profile All V-8 V-8 Elec. Shift 1966 thru 77 High profile T/C 120 & 140 4 cyl. Mech. Shift 1978 thru 82 400 Series (white) HORSEPOWER DESCRIPTION YEAR DETAILS & NOTES 120 & 140 4 cyl. Mech. Shift 1983 thru 86 400 Series (silver) 3.8 V-6 Mech. Shift 1978 thru 82 800 Series (white) 4.3 V-6 Mech. Shift 1983 thru 86 800 Series (silver) All V-8 V-8 Mech. Shift 1978 thru 82 800 Series (white) All V-8 V-8 Mech. Shift 1983 thru 86 800 Series (silver) 2.3 4 cyl. Mech. Shift 1986 thru 93 Cobra drive, small hub 3 4 cyl. Mech. Shift 1986 thru 90 Cobra drive, small hub 3 4 cyl. Mech. Shift 1991 thru 93 Cobra drive, large hub 4.3 V-6 Mech. Shift 1986 thru 93 Cobra drive, large hub 5 V-8 Mech. Shift 1986 thru 93 Cobra drive, large hub 5.7 V-8 Mech. Shift 1986 thru 93 Cobra drive, large hub 7.4 V-8 Mech. Shift 1986 thru 93 Cobra drive, king hub DRIVE ASSEMBLIES OMC LOWER DRIVE ASSEMBLIES HORSEPOWER DESCRIPTION YEAR DETAILS & NOTES All engines Electric shift 1966 thru 77 Electric shift 2.5 & 3.0 400 Lower 1978 thru 82 400 (white) 2.5 & 3.0 400 Lower 1983 thru 86 400 (silver) 3.8 / 5.7 800 Lower 1978 thru 82 800 (white) 4.3 / 5.7 800 Lower 1983 thru 86 800 (silver) 2.5 & 3.0 Cobra lower sm. 1986 thru 93 Wide body sm. Carr. 4.3 / 5.8 Cobra lower lg. 1986 thru 90 Wide body lg. Carr. 3.0 thru 5.8 Cobra lower lg. 1991 thru 93 Wide body tabs carr. 4.3 / 5.8 Cobra lower lg. 1989 thru 93 Cobra counter rotation 7.4 King Cobra 1986 thru 93  King Cobra mech. Shft. 7.4 King Cobra 1986 thru 93  King Cobra counter 7.4 King Cobra 1986 thru 93  King Cobra direct drive.         DRIVE ASSEMBLIES OMC UPPER DRIVE ASSEMBLIES HORSEPOWER DESCRIPTION YEAR DETAILS & TEETH # 120 & 140 4 cyl 1966 thru 77 High profile, 16/20 120 & 140 4 cyl 1966 thru 77 High profile T/C, 16/20 120 & 140 4 cyl 1966 thru 77 Low profile, 16/20 120 & 140 4 cyl 1966 thru 77 Low profile T/C, 16/20 All engines V-6 1966 thru 77 High profile, 19/20 All engines V-6 1966 thru 77 High profile T/C, 19/20 All engines V-6 1966 thru 77 Low profile, 19/20 All engines V-6 1966 thru 77 Low profile T/C, 19/20 All engines V-8 1966 thru 77 High profile, 21/16 All engines V-8 1966 thru 77 High profile T/C, 21/16 All engines V-8 1966 thru 77 Low profile, 21/16 All engines V-8 1966 thru 77 Low profile T/C, 21/16 2.3 & 3.0 4 cyl 1978 thru 82 400 (white) R/H, 21/18 2.3 & 3.0 4 cyl 1983 thru 86 400 (silver) L/H, 21/18 3.8 V-6 1978 thru 82 800 (white) R/H, 21/20 3.8 V-6 1983 thru 86 800 (silver) L/H, 21/20 4.3 V-6 1985 thru 86 800 (silver) L/H, 21/19 5 V-8 1978 thru 82 800 (white) R/H, 21/17 5 V-8 1983 thru 86 800 (silver) L/H, 21/17 5.7 V-8 1978 thru 82 800 (white) R/H, 21/16 5.7 V-8 1983 thru 86 800 (silver) L/H, 21/16 2.3 4 cyl 1986 thru 93 Cobra Drive, 21/21 3 4 cyl 1986 thru 93 Cobra Drive, 21/18 4.3 V-6 1986 thru 93 Cobra Drive, 21/19 5 V-8 1986 thru 93 Cobra Drive, 21/17 5.7 / 5.8 V-8 1986 thru 93 Cobra Drive, 21/16 7.4 V-8 1986 thru 93 Cobra Drive, 21/17 7.4 V-8 1986 thru 93 Cobra Drive cone shift