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Spark Plug Torque, Yamaha 115, 2002

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  • Spark Plug Torque, Yamaha 115, 2002

    My manual tells me to torque my plugs at 18ft/lbs or major malfunction may occur. I tried to torque them at this spec, but it felt like I was going to strip the threads out....so I just tightened them by feel like I usually do. Do they need to be "specifically torqued"? In the past I have never torqued a spark plug, on a car or marine engine....any comments out there?...thanks.

  • #2
    Re: Spark Plug Torque, Yamaha 115, 2002

    u sure u were set to 18ft/lbs not 18 Newton meters?
    18ft is not that much
    HUMAN BUILT = HUMAN FIXED
    CERTIFIED MARINE TECH

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    • #3
      Re: Spark Plug Torque, Yamaha 115, 2002

      Absolutely, ft/lbs. Maybe it could be the quality of the wrench...from Pep Boys? Never the less, are there any hidden dangers if they are not all torqued at 18 ft/lbs?

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      • #4
        Re: Spark Plug Torque, Yamaha 115, 2002

        they could back out
        turn the wrench fown to 10 ft/lbs and see if it clicks
        u could have a crap wrench
        HUMAN BUILT = HUMAN FIXED
        CERTIFIED MARINE TECH

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        • #5
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          Re: Spark Plug Torque, Yamaha 115, 2002

          It does sound like a wrench problem. I have done them without the torque wrench for years without a problem. They have to be tight enough to seal and not back out. You can strip the threads out if you overdo. 18 lbs shouldn't require that much of a pull.

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