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    adjusting air fuel mixture or idle screw 0n a 1980 mercury 70 horse

    Does anyone have information on how to adjust these two carbs on my 70 horse merc. carbs are rebuilt but not set up. 1 and a half ,2 and a half turns of the screw. ???????? 1980 merc inline 3. thanks much.
  2. C

    1980 mercury 70 horse power problem.

    ok after talking with the guy i got the boat from, he told me he fooled around with the carbs and i have a feeling that when i put the boat in the lake and it is under load it keeps stalling. now i am not a marine mechanic but i have a feeling this is why it runs good with muffs, on but not...
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    1980 merc 70 horse,help.

    hello guys,I have a 1980 merc 70 horse 3 cylinder. my problem i have is i had it tuned up and got it to start no problems with muffs on. I put it into gear and idles nice both forward and reverse. the problem is i went to put it in the water and give it a small run around the lake ,it fired up...
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