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    4.3 L Mercruiser running rough when warm

    I have a feeling this is a common question BUT here we go. Boat is a 1991 Sea Ray 170 with 4.3L Mercruiser V6, 2BBL carb Boat starts instantly when cold. Will run 95-100% perfect for 10-15 minutes full speed then it starts to miss and bog and run rough. What has been done so far in...
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