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    Mercury 90 Loss of power above 4200 RPM

    I have a new to me 2009 Mercury 90 hp, 2 stroke, ELPTO 1090412FY serial # 1B780051 It starts well, idles pretty well, a little rough. It accelerates well and powers up quickly to about 4200 RPM, which is maybe 3/4 throttle. If I push the throttle past 4200 rpm the engine loses a small amount of...
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    Troubleshoot Mercury 90 bogs over 4200 rpm

    2009 Mercury 90 Hp 2 stroke ELPTO Will not get above 4200 RPM and not getting expected high end speed/power, and has a rough idle. I did the "rag test", covering each carburetor in turn. The engine dies when I cover the inlet of the top and middle carburetor, but continues to run when I cover...
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