No, that's the one that replaced the one you've got for the #4 starter gear. You need this one or this one. I'm not sure what the difference is, but the part numbers do differ by one number. However, they both refer to the clip as having the same 256-15687-00 number.
http://www.boats.net/parts/detail/yamaha/Y-90468-26045-00.html
http://www.boats.net/parts/detail/yamaha/Y-90468-26044-00.html
The 26045 clip is the one listed for the '73 and older models but like I said, I don't know for sure if there's any difference between it and the 26044 clip. Both were used on many models. Maybe you could scrounge one?
http://www.boats.net/parts/detail/yamaha/Y-90468-26045-00.html
http://www.boats.net/parts/detail/yamaha/Y-90468-26044-00.html
The 26045 clip is the one listed for the '73 and older models but like I said, I don't know for sure if there's any difference between it and the 26044 clip. Both were used on many models. Maybe you could scrounge one?