I have a 90 four stroke Mercury 2001. Have a issue with poor idle and stalls. It runs great after take off. But poor idle and motor skake. I have had carbs rebuilt,new filters,new plugs and fresh gas. My problem make it hard to put on the trailer on windy days. Mechanic completely went over and says all is good. But after the engine warms up it is back to poor idle issues.
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