Mercury - Quicksilver 8M6007543 Trim/Tilt Motor OMC Cobra Sterndrive Series Marine-Grade Construction 8M6007543. Overview. Anyone who's spent enough time running an older OMC Cobra knows how much you rely on a trim system that responds the moment you touch the switch. It's one of those quiet essentials-the kind of thing you don't think about until it stops working. With the Quicksilver 8M6007543 Trim/Tilt Motor, that worry fades fast. You get a crisp, confident response every time you raise or l