Honda bf225 tach reset

[AUSCGMK3]

I have just replaced a honda bf225 and the honda tach still shows the previous engines hours, any suggestions on how to reset it ? I cannot find any help in the 225 shop manual or the owners manual. I need to have new engine hours to keep the maintenance schedule correct.

[boats.net]

Can't reset engine hours on tach, can replace tach then hours will be at zero.