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  1. M

    1970 Johnson 40hp 40e 70a spark plug

    And the water in the bucket looks like some type of substance on top like darkish color I can take a photo in the morning kind of looks like dark oil but I don’t know it’s my first boat just trying to get my idle running good so I can try to troll for walleye but it might be to fast to bottom...
  2. M

    1970 Johnson 40hp 40e 70a spark plug

  3. M

    1970 Johnson 40hp 40e 70a spark plug

    1970 Johnson 40hp 40e 70a looking for what spark plug I need right now I have ngk b6s and What gap I need I seen 0.03 my old plugs ends are black What causes the spark plug end to be black is it bad gas or wrong mixture I used a mixture bottle or it could be the cheap oil the guy gave me might...
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