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Thread: 2004 gp1300r.

  1. #1

    2004 gp1300r.

    Hey hi all. Any help on this. Which lazer iridium ngk spark plug. ? For 2004 yamaha gp1300r thx d

  2. #2
    dannyual777's Avatar
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    Maybe this will help. It only shows a standard NGK plug for your ski.

    https://jetskisint.com/blog/ngk-spark-plug-chart/


  3. #3
    I installed Iridium car candles on the gp1200r. my advice to you is not to do it. glow ignition occurs and the engine goes into gear and can be stopped only by closing the choke valve. even if you remove the plug caps and turn off the gasoline, it will run at the highest possible speed. this can happen on the ground when the candles are hot and you turn it on and step on the gas.

  4. #4
    dannyual777's Avatar
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    That is a very good point, Oleg. I had the same thing happen with my boat last weekend. It is a 5.0L inboard/outboard with iridium plugs. I was idling when I accidentally pulled out the kill switch lanyard and the hot plugs kept the engine running. It was actually "dieseling" where it was barely running and rough but it was running.

    Maybe it's not a good idea to run iridium plugs in a ski.

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