Reply To: '57 Merc Mark 25 Carb Needed Valve Settings

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July 16, 2019 at 2:22 pm #178984
wabittle
Participant

    Aaah! I found an old Mercury shop manual and it states that the idle speed should be 1 turn out and the high speed is 1 1/2 turns out from seat position. Nothing like a shop manual … to bad no one fixes anything anymore and they don’t print them for much of anything! I can’t even get one for my 2015 Honda CRV.

    Again, thanks for all that posted replies. Your info would have most likely worked perfectly well too!

    Regards,

    Wade