well mechanic took me! the old electric shift omc stern drive is not compatable with trucourse steering! this drive came off a boat that had thru trasom steering. my boat does not have this. there is a kit but says it does not provide clamshells.does any one know what they r or maybe another name for them? so that is why i spin to left when engaged but now i have a thru hull steering stern drive & and a internal tru course steering system sick of being taken & dry docked