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    Simple Diagnosis Report Question

    Hi: I have a boat with twin 2020 Honda BF250D motors and had a service technician do a quick OBDC check which produced a single page report. I was hoping for a more comprehensive report but... Both engines show about 174 hours. I have just a couple questions: 1. Under "Other...
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    Need ignition switch: 1993 mercury mariner 150 magnum

    I have a 1993 Mercury Mariner 150 Magnum II and it appears the ignition switch is failing 1. Does anyone know where I can get a replacement and how do I find the specific part number 2. Is there a way to test the current one with a multimeter? 3. Is it possible to “hot wire” to make sure...
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    10W40 Oil Used in Fuel mixture

    Hi: I just purchased a sailboat that came with a small inflatable dinghy and a 4 HP Johnson Seahorse outboard. (don't know the year). The motor seems rot run fine (smoked just a little) but after running a few minutes I looked at the oil bottle that was in the boat... It was 4 cycle 10W40...
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    Mariner 150 overheating?

    I have a 1993 Mercury Mariner 150 Magnum II which has always run really well. Last time I ran it, however (first outing of the season) the temperature gauge climbed to about 200 degrees in 5-10 minutes at 3000 rpm and the warning horn sounded. I shut the engine down and let it cool. I...
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