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  1. #1

    Best Sparkplugs for 150 Speedster

    Best Sparkplugs for 150 Speedster
    Alright, I know this might be stupid question but I'm still a new to this. (eventhough I've had my boat since '07) I have the factory plugs in my boat and I want to change them to something better. I have read about Denso being the best...any suggestions. This summer I'm doing one mode to my boat... air intake...and I want to change the plugs...I recently took the boat out and it was running rough since I made the mistake of leaving old fuel in the tank for a couple of months....I also want to change the oil to amsoil,,,anything better outthere...???

    Thank you all,,,,



  2. #2
    ...Lighting The Water On Fire Since '04 duramaxxed's Avatar
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    Jun 2008
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    If you're gonna Mod the Boat, you want the Denso IXU27's. I forget what the P/N is for the Plugs if you aren't going to Mod.

  3. #3
    Quote Originally Posted by duramaxxed View Post
    If you're gonna Mod the Boat, you want the Denso IXU27's. I forget what the P/N is for the Plugs if you aren't going to Mod.
    Duramaxxed,
    Thanks for the info... I stayed with the original spark plugs since my boat is bone stock....

  4. #4

    Join Date
    Jan 2007
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    Lakeland, FL
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    Quote Originally Posted by Rspeed View Post
    Duramaxxed,
    Thanks for the info... I stayed with the original spark plugs since my boat is bone stock....
    Good choice. I've got the IXU27s, but there's really no benefit over the stock plugs, even moreso on a stock boat.

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