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    Ground on positive wire coming from module

    Hey guys has I was hooking up a new gauge I was testing some circuits I have a 01 200 merc efi and I was using purple as my i wire when I touched the purple to any positive with the test light to my surprise it lit very dim though and I heard the fuel pump come on I tracked the wire and the...
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    2001 mercury 200hp starting issues

    Hey guys I have a 2001 200hp mercury it has mechanical oil pump which mixes oil in the vst motor is efi original motor was carb got a onboard 100 gal tank has a fairly new primer bulb my issue is it will start then shut off several times then it will start and run fine I cut it off and try to...
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    2001 mercury 200hp starting issues

    Hey guys I have a 2001 200 HP Mercury it's not a optimax but it is efi it will turn start dies out several times then it will start and idle just fine sometimes it will start idle high then cut right out I'm almost sure it's fuel issue just don't know where to start boat originally had carb...
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    Mercury thermostat issue

    Hey guy I have a 200 HP Mercury efi I'm working on cooling system shop rebuilt lower unit installed it was not pumping out tell tale broke down unit seems like impeller wasn't not changed I ordered a new housing with a new kit hopefully this will work but if it does not I recently found out I...
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    2001 mercury 200hp efi saltwater series issues

    Hi guys new here got a couple of things I just installed a 200 merc on my fishing boat it's efi I bought quicksilver controls so it would be simple to hook up to harness but positive wire for fuel pump on motor wasn't there so I found a power source activated by ignition my question on this...
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