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    150 EFI ongoing issue

    So I have a 1999 mercury 150EFI. I have had to replace several things on it such as, repair leaking VST, switch boxes, trigger. The motor was missing at idle and wanted to die and cut out all through the mid range. It would run good on the top end if I could get there without it dying. As I was...
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    1999 Mercury 150 EFI ignition issue

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    92 Mercury 25hp 2-stroke - Not getting spark

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    92 Mercury 25hp 2-stroke - Not getting spark

    Okay, do you have a DVA adapter to check and troubleshoot components? Also are you positive it is not getting any fire, like did you try to crank motor with pulled plug and look for spark? I pulled a copy of a mercury 25 HP repair manual and will attach its ignition troubleshooting page.
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    92 Mercury 25hp 2-stroke - Not getting spark

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    92 Mercury 25hp 2-stroke - Not getting spark

    Have you checked and secured all grounds on ignition system? So the plugs are not getting any spark at all, or is it weak/intermittent spark?
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    1999 Mercury 150 EFI ignition issue

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    1999 Mercury 150 EFI ignition issue

    Okay I have a DVA coming in Wednesday. I did swap the stator leads coming to switch box to see if problem moved to other side and it did not.
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    1999 Mercury 150 EFI ignition issue

    So I have a 1999 Mercury 150 EFI that has an ignition issue. It has a rough idle and runs rough up until I get around 3000 RPM’s and then it picks up, but I have still lost around 500 RPM’s at WOT. I have replaced HP fuel pump, fixed all fuel leaks, and changed filters. I checked the stator and...
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