Adjusting new tachometer???

I have a Triton. The the trim gauge went out on it. It is a dual tachometer/trim gauge. I bought a new one online and now I have a trim gauge the functions but a tachometer that is reading way too high. Is there a way to adjust them? When you try to get on plane the tach is pegged. Is there an adjustment or should I return it? Thanks for your relies.

I don't think they are adjustable. The one for my Etec was reading wrong and it had to be replaced.

That stinks

Google Beede Tach Settings. 5" Dual

Thank you I'll call beede support in the morning. That is the brand of gauge.