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  • #1

    Clean spark plug

    So i pulled my spark plugs out the other day doing some general maintenance and i noticed one was clean like it came out of the box. So i did a compression check and they all came back in the mid 90's. Next i hooked up an in line spark tester and i had spark. So then i i let the motor run and sprayed some wd40 in the carb to see if the idle changed. No change except for some smoke, so i think i have covered the basics (compression, spark, and fuel) so i think it must be getting water in there via the head gasket. Am i on the right track? The motor is an 150 extd 1990 and the head gasket has never been changed.

    Thanks
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  • #2
    water will typically leave deposits, crusty orange/red and with salt water small green spots on the ground electrode.

    lack of fuel will leave oil.

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    • #3
      kind of sounds he it leading to lack of oil maybe?

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      • #4
        The strange thing is the plug shows no signs of wear at all. Wouldn't the plug show some signs of firing. How would i check to see if its getting oil. The cylinder on the other side of the carb is defiantly getting oil and the plug shows normal signs of wear.

        Thanks

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        • #5
          okay pulled that oil tube off and seemed to have a steady flow of oil. whats next? need help?

          Thanks

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          • #6
            I'm having the same issue on my 89 150 precision blend flat top. I tested the continuity of electricity and there's no spark being sent from the coil. I swapped it for another coil that IS working and still no electricity. Any suggestions?

            Have u checked your coil?

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