Yamaha control box 703 vs 704

Hello everybody;


I have a question about Yamaha control boxes. Earlier I had a Yamaha 70hp autolube 2-stroke from 1991 with a 703 control box with one digital multiinstrument.
Now I bought a V4 100 AETO autolube from 1999 with controlbox 704 which has 2 digital innstrument. Unfortunately I can’t unse the 704 box in my boat. Is it possible to rebuild the 703 box to fit this engine with to digital instrument? Both of them had a 10-pin connector but 704 has a separate ignition key.
Hope you understand my bad English..


Best regards;//Gostap

You can absolutely positively use a 703 control box instead of a 704 control box. You do not have to do anything to the 703 control box.

Your English is just fine. Perfectly understandable.

Thank you boscoe for your answer, still confused since there is much more cables from 704 vs 703? See my bad pictures..

Just a different ten pin harness is all.

704 uses one with two connectors at one end. Plus a key switch panel.

703 uses one with a connector at one end and bullet connectors at the other. The bullet connectors should be within the control box.

All else is the same.

Thanks a lot!!