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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 . |
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