1999 ox66 250 fuel management

Can anyone help me with a part number for a 1999 ox66 fuel management system sending unit part #? I have a pair of 250's on a 31' contender. The motors are original 1999's.

Any help would be greatly appreciated.

Thanks,
Rob

[boats.net]

Number 15 in this diagram is fuel flow sensor Yamaha Outboard Parts 2005 2005 OUTBOARD RIGGING GUIDE INSTRUMENTS DIGITAL Diagram

thanks very much, will that work on a 1999 system, it looks like the link is for a 2005? thanks again