Mercury Mercruiser GM V-8 305 CID / 350 CID Engines Service Manual., Page 85Get this manual

Mercury Mercruiser GM V-8 305 CID / 350 CID Engines Service Manual., Page 85

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SERVICE MANUAL NUMBER 24
Cold Fouling
Dry, black deposits indicate rich fuel mixture or weak ignitionClogged flame arrestor, flooding carburetor, sticky choke or weak ignition components a