mercury gearbox swap

[geordielad2]

Hi, anyone help with this.I have a 1999 merc 115 two stroke and the gearbox serial number 1667-9010-08 got the chance of a 2004 merc 125 two stroke gearbox,serial number
1667-910-C8 725G and the number above the two anodes is 605 i'm wanting to know if this compatible with my engine.

 

[galamb]

IF your 99 has it's original gearcase (and that number looks quite a bit older) and IF the 2004 is original then they should swap out fine.