10-02-2009, 05:33 AM
I've got an 84 merc 7.5hp that runs a 50:1 and doesn't smoke at all, never had a problem with it. Also I just got a 76 merc 9.8hp that runs the same mixture just fine. I've never tried to change the mixture, don't know why you would. What's your reason for wanting to change it?
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