It sounds like it can be done. First you need to find out what the tach needs for an input, what levels, speed and form. Then you can have the arduino output that to the tach. After you get that working then start on the control.
It sounds like it can be done. First you need to find out what the tach needs for an input, what levels, speed and form. Then you can have the arduino output that to the tach. After you get that working then start on the control.