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  1. spdracr39

    Medallion Tach Settings

    I have a 4 cylinder 470 merc and the tach is reading low. I looked at the back and it has four settings 1-2-3-4. It is currently set on 3. Does anyone know the correct setting? I guess if not I will try each one next time out.
  2. spdracr39

    Tach reading wrong

    I just got this boat and the tach works but reads low. It reads 3000 rpm at wot and should be around 4500. The motor is turning faster than it says for sure. What setting should it be set on to read correctly. My engine is a mercruiser 470 I-4 170hp.
  3. spdracr39

    Silly question from a noob

    I have a mercruiser 470 setup but I shows in the books to be a mercruiser 1. is this the same as an alpha 1?
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