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Results 1 to 8 of 8
  1. #1

    Default Oil on Spark Plugs

    Hi - I have a 90hp Mariner 2 stroke outboard motor. On removal of the spark plugs I noticed they were full of oil. Is this normal or is there a problem. All 3 the spark plugs had oil on them (2 stroke oil).

  2. #2

    Default Re: Oil on Spark Plugs

    had it just gotten done running?

  3. #3

    Default Re: Oil on Spark Plugs

    Yes - it was a day after running for about 4 hours. I wanted to replace the plugs and noticed it.

  4. #4
    Join Date
    May 2010
    Sebastian ,Fl

    Default Re: Oil on Spark Plugs

    Your running a motor that burns oil and gas combo.It's normal to have a residue left.
    Do a compression and spark test.
    That tests normal then I wouldn't worry.J
    Get towing insurance.Great investment.
    88 Bayliner with twin 85's

  5. #5

    Default Re: Oil on Spark Plugs

    Thanks - will do!

  6. #6
    Join Date
    Sep 2010

    Default Re: Oil on Spark Plugs

    Is the motor running cool---------------------Is a thermostat in place and working properly ????

  7. #7
    Join Date
    Sep 2003
    New Tripoli, PA, USA!

    Default Re: Oil on Spark Plugs

    ALL--repeat--ALL plugs in a two strokes look like they are running cold and wet after any period of prolonged idling.


  8. #8
    Join Date
    Sep 2010

    Default Re: Oil on Spark Plugs

    Is automatic oil injection in use ????--------Has oil output from the pump been checked by a shop ?????

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