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Thread: Spark plugs

  1. #1

    Spark plugs

    I have a '03' ultra 150 and want to change the spark plugs, which are the correct ones NGK BR8ES or BR9ES or it doesnt matter?

    Thanx!


  2. #2
    btldigger's Avatar
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    Br9es is the correct plug

  3. #3
    Quote Originally Posted by btldigger View Post
    Br9es is the correct plug
    Thank you, will purchase them now.

  4. #4

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    hey digger is that the same ones for a 97 stx 1100

  5. #5
    btldigger's Avatar
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    Yes should be thats what my 98 takes too.

  6. #6
    Don't pee in my Pool 150ofUltra's Avatar
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    Better spark plugs

    I looking to replace the plugs on my 01 Ultra 150. Now I know what is correct, but is there anything better! The ski is all stock on the motor, for now.

  7. #7

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    Guys at the auto shop suggested using BR8ES. They said its a hotter plug and can help with minimizing fouling problems. Seems fine so far. I have noticed it doesn't take as long to turn-on from a cold start.

  8. #8
    btldigger's Avatar
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    Use caution with that advice. It can cause detonation especially on an ultra. I have used them but just be aware.

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