Tachometer on new engine seems wrong.

I went from a yamaha 2002 90 tlr to a yamaha 1999 b115tlr

I never had any issues with the tach before. On this new engine thought my tachometer goes off the chart at higher speeds. I found that you can calibrate it but I seem to be already as high as the tach can go, 6P. All other settings are lower which causes my tachometer to be even higher.

I can’t figure out what setting I’m supposed to be on. I’m wondering if I need a new tach. A local prop shop gave me a different prop that should be over propped.

im hesitant to buy a new tach but all of the settings go the wrong way

Should be on the 12 pole setting.

So if I’m already on 6P, which I believe is 12 pole, then I either have a bad tachometer or the prop is spinning too fast? Here is a video of it set on 6P with a prop that should be over propped for this engine

https://youtu.be/h0EM6iNFK8w