1977 OMC Stern Drive Models Where can I find my model number? 120 990234E 990234E1 990235E 990235E1 140 990236E 990236E1 990237E 990237E1 175 990229E 990229G 990230E 990230G 190 990231E 990231G 990232E 990232G 235 990240E 990240G 990241E 990241G
