I swapped a 1980 200HP Johnson outboard with a 1984 235hp Johnson and it started right up but the shift linkage can only be adjusted to get forward gear and neutral but not reverse. Or I can get it to give me reverse and neutral but not forward. It just wont let it go into reverse when I adjust it to go into forward seems like to much play in the cable about 3/8 inch. Could I have the throttle and the shift cables mixed up? Or do I need to replace the shift cable?