A tach/dwell meter. Been a long time since I set dwell angle.
Welcome and what year/model is the power?
Most OMC`s run 950 0n mufffs, 850 +/- 50rpm in water, and 650 +/- 50 underway at idle.
If you see those numbers on a carb`d motor, you are fine with the tach reading.
Is that a system check tach from omc?
Cheers,
GFS
.
|