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  1. #1
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    2002 200 HPDI spark plugs badly fouled

    The other day I was out and noticed that in gear idling there was a slight miss when I pushed down on the hotfoot quickly. So yesterday I took out all the spark plugs and every one of them were fouled pretty bad. They were not wet. I also noticed with the plugs out that when I looked into the top port side cylinder, there seemed to be a layer of carbon buildup on the piston. I could see the middle of the piston where there was not any carbon which I assume is because that is the hottest and closest point to the spark plug. These plugs are brand new after the winter and ordered from one of the sponsors here sparkplugs.com (installed in March). I used the sparkplug finder on the website to make sure I was getting the correct plug. The gap was checked before install and all were gapped correctly. This winter a new oil filter was installed, fuel filters cleaned or replaced by mechanic, and a 10 micron water separator was installed. I always use ring free and marine stabil and yamalube. Mechanic checked out the O2 sensor and said it was good. The motor was on diagnostics and had 150 hours as of last August, and I would say now it probably has 160-165 hours. What could be causing this plug fouling problem?




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  3. Louisiana Bass Club Moderator JOHN202's Avatar
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    #2

    Re: 2002 200 HPDI spark plugs badly fouled (BassManGuy)

    Its the Yamalube. If you gonna keep running that you will need to change your plugs 2-3 times per year instead of once a year depending on how much you use your boat. JMO..

    BLAZER 202 - 250 HPDI

  4. Skeeter Boats/Missouri Club Moderator Rodney Bledsoe's Avatar
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    #3

    Re: 2002 200 HPDI spark plugs badly fouled (JOHN202)

    <table width="90%" cellspacing=0 cellpadding=0 align=center><tr><td>Quote, originally posted by JOHN202 &raquo;</td></tr><tr><td class="quote">Its the Yamalube. If you gonna keep running that you will need to change your plugs 2-3 times per year instead of once a year depending on how much you use your boat. JMO..</td></tr></table>

    ????? I don't agree with this statement.

    Are you using Ring free?

    I have the same motor as you and run yamalube only and change my plugs once a year. I am using NGK BKR7EKU plugs. They are one step up hotter.

    My boat started started idling funny, loss of speed and rpm. I have it H/T right now. I had a couple BRAND NEW plugs that were blackened. They just called me this afternoon to let me know I had a broken reed. They also commented that they noticed some carbon build up and asked if I was using ring free.

    If yamalube causes problems with motors why does yamaha and H/T recommend it?

    If you read the oil reports pinned above you'll notice yamalube has more additives than any other brand tested.

    If you did a search on oil for yamahas you will probably see it's asked a lot. Everyone has there reason why they use this or that oil, so I'll ask the question again "Why does Yamaha & Hydro Tec recommend yamalube???"

  5. Louisiana Bass Club Moderator JOHN202's Avatar
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    #4

    Re: 2002 200 HPDI spark plugs badly fouled (Rodney Bledsoe)

    <table width="90%" cellspacing=0 cellpadding=0 align=center><tr><td>Quote, originally posted by Rodney Bledsoe &raquo;</td></tr><tr><td class="quote">

    ????? I don't agree with this statement.

    Are you using Ring free?

    I have the same motor as you and run yamalube only and change my plugs once a year. I am using NGK BKR7EKU plugs. They are one step up hotter.

    My boat started started idling funny, loss of speed and rpm. I have it H/T right now. I had a couple BRAND NEW plugs that were blackened. They just called me this afternoon to let me know I had a broken reed. They also commented that they noticed some carbon build up and asked if I was using ring free.

    If yamalube causes problems with motors why does yamaha and H/T recommend it?

    If you read the oil reports pinned above you'll notice yamalube has more additives than any other brand tested.

    If you did a search on oil for yamahas you will probably see it's asked a lot. Everyone has there reason why they use this or that oil, so I'll ask the question again "Why does Yamaha & Hydro Tec recommend yamalube???"
    </td></tr></table>

    I'm not tryin to start a pissin match,Like i said its JMO and that is from my own experence. Now if you take the time to also read post from this board you will see that i'm not alone. If Yamahalube working for you then thats great, it did not for me.I'm on my fourth Yamaha and they have had no issues with carbon of fouled plugs.

    BLAZER 202 - 250 HPDI

  6. Member briansgi's Avatar
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    #5

    Re: 2002 200 HPDI spark plugs badly fouled (JOHN202)

    I've seen numerous people on this forum post where they were constantly fouling plugs and switched from Yamalube over to a full synthetic and solved that issue. I'm not saying Yamalube isn't a quality oil, but it seems to have a track record of causing this issue.
    2008 Z520/Yamaha 250



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    #6

    Re: 2002 200 HPDI spark plugs badly fouled (Rodney Bledsoe)

    so I'll ask the question again "Why does Yamaha & Hydro Tec recommend yamalube???"
    [/quote]

    Because it costs more, they sell it and they want your money. Pennzoil premium plus is just as good if not better, its only $14 per gal and you can get it anywhere. Works for me and for many others.
    Rich Z, USAF Ret.
    BRUCATOsvs.com More Power To You

  8. Skeeter Boats/Missouri Club Moderator Rodney Bledsoe's Avatar
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    #7

    Re: 2002 200 HPDI spark plugs badly fouled (Rich Z)

    <table width="90%" cellspacing=0 cellpadding=0 align=center><tr><td>Quote, originally posted by Rich Z &raquo;</td></tr><tr><td class="quote"> so I'll ask the question again "Why does Yamaha & Hydro Tec recommend yamalube???"
    </td></tr></table>

    Because it costs more, they sell it and they want your money. Pennzoil premium plus is just as good if not better, its only $14 per gal and you can get it anywhere. Works for me and for many others.[/quote]


    I really hate to answer this question, but it's all about lubrication of the pistons. 3 years ago I was having my motor head rebuilt at H/T - NOT RELATED TO LUBRICATION- I was thinking of changing to a popular synthetic oil. I was shown a piston with over 400 hour on it that ran yamalube and it was in good shape. Then I was shown a piston that had about a quarter of the hours on it of the oil I was wanting to change to and it didn't look as good as the yamalube one. Could there have been another factor that caused the other one to look more warn?
    The only reason I can defend my statement on is look at the oil reports that is pinned at the top of this page. Yamalube has different and more of some ingredients the all the others. Is that the reason I REALLY DO NOT KNOW.

    I think the problem with the original post is he isn't running ring free. What little of understanding I have heard CARBON is a huge problem with yamaha's could it be related to yamalube?? Or is it the way a motor is ran?

    I agree it is very pricey oil, I always try to find it bulk when possible, but what is the price of a rebuild?

    If you have a brand that works well with you and is in your price range for oil by all means use it. For the time I've been a BBC member these ford - chevy argument continue. I just don't care for everyone to say it's a yamalube problem. Do other oils burn cleaner? I'd say from others experience YES.

  9. Member Z518 Comanche's Avatar
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    #8

    Re: 2002 200 HPDI spark plugs badly fouled (JOHN202)

    <table width="90%" cellspacing=0 cellpadding=0 align=center><tr><td>Quote, originally posted by JOHN202 &raquo;</td></tr><tr><td class="quote">Its the Yamalube. If you gonna keep running that you will need to change your plugs 2-3 times per year instead of once a year depending on how much you use your boat. JMO..</td></tr></table>I don't agree either. I use Yamalube and ring free. My boat is 4yrs old and I have changed my plugs 1 time.

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    #9

    Re: 2002 200 HPDI spark plugs badly fouled (BassManGuy)

    <table width="90%" cellspacing=0 cellpadding=0 align=center><tr><td>Quote, originally posted by BassManGuy &raquo;</td></tr><tr><td class="quote"> . I always use ring free and marine stabil and yamalube. </td></tr></table>

    Rodney, if you will read the guys post, he said he used Ring Free and all the other good things you like.





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    #10

    Re: 2002 200 HPDI spark plugs badly fouled (rangerguy)

    Yes I use ring free with every fill up. I have only used yamalube. I add marine stabil with every fill up as well. I appreciate everyone's help and opinions on what oil I should be using' but I was not lookng for help on what brand oil is better and yamalube is what I have been using and don't plan on changing so let's take that out of the equation. Not trying to be disrespectful to those who have shared their opinions on what brand oil is better I appreciate the comments. But, I don't feel that could be the only reason for my fouled plugs. Any other suggestions besides yamalube being the culprit? Thanks!




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  12. Member
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    #11

    Re: 2002 200 HPDI spark plugs badly fouled (BassManGuy)

    maybe the oil pump is sending too much oil to motor? I know those things are sensitive and have to be calibrated right, I'm not a mechanic, but I know several of the posters have had to recalibrate their pumps on here.

    By the way, I only run Yamalube and wouldn't DREAM of using anything else in my motor. From day 1 during break in to now, the same stuff, Ringfree and Yamaha oil.

    Best of luck. Jim 2003 Stratos 200ProXL/225 HPDI


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