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    200 HPDI fouling plugs- Thanks, Rodbolt

    Thanks for your suggestions, Rodbolt. Your response a couple of weeks ago was very detailed and helpful.<br /><br />On the third try we figured out the problem. (I was ready to replace the O2 sensors even though thet insisted they were OK.) I had a bad connection inside the plug connecting the...
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    200 HPDI fouling plugs

    I have twin 2003 200 hpdis. They've run great. At 190 hours one engine started running rough. It got worse until it would only get up to 1800 rpm. Several plugs were fouled. Changed plugs and great again for 2 hours then the same thing. My Yamaha mechanic adjusted down the oil flow but they...
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