Omc Outdrive Serial Numbers
Mercruiser Sterndrive Alpha One Gear Chart RatiosHorsepowerEngineYearRatio120 thru 1404 cyl. One drive1971 thru 791.94 / 20-24170 thru 1904 cyl.
Omc Cobra Serial Number
One drive1971 thru 791.81 / 17-191656 cylinder1971 thru 791.62 / 24-24188 thru 260V-81971 thru 791.47 / 20-22120 thru 1404 cyl. One drive1980 thru 841.94 / 20-24170 thru 1904 cyl. One drive1980 thru 841.81 / 17-191656 cylinder1980 thru 841.62 / 24-24188 thru 260V-81980 thru 841.47 / 20-22120 & 1404 cylinder1985 thru 891.94 / 20-24120 & 1404 cylinder1985 thru 891.94 / 20-24170 thru 1904 cylinder1985 thru 891.81 / 17-19170 thru 1904 cylinder1985 thru 891.81 / 17-19198V-81985 thru 891.62 / 24-24198V-81985 thru 891.62 / 24-24198 thru 260V-81985 thru 891.47 / 20-22198 thru 260V-81985 thru 891.47 / 20-22Alpha One Gen II.