mercury 2018 200 pro xs 4.6l

by Troy watters
(Wilmington N.C.)

motor developed a miss a couple of weeks ago i have vessel view mobile installed and it shows no codes present riding on the water you can feel the miss and see a 200 rpm drop on the tachometer it seems to disappear or maybe smooth out at around 5000 rpm but as you slow down it comes back and stays all the way to idle motor only has 85 hrs on it checked plugs with bench top spark tester all seemed good dealer has boat now and says there arent any codes showing duh told you that any help would be great

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