In the boating section I posted a long winded story how I couldn't start my boat yesterday. Turned out 3 of 4 NGK plugs were shorted and the engine got flooded. I replaced the plugs with old OEM AC ones and the engine started. Now is the interesting story. I let the plugs dry overnight and their resistance measurements between the electrodes are: 3 MOhm, 13 MOhm, 100 MOhm, and infinity (this is the only one that didn't short).
I washed them in solvents, dried, and got exacrly the same results. Seems permanent failure. The plugs are in good shape, not oiled, carboned, etc. Some superficial corrosion on the outside coating though. They worked fine when boat was put to storage 2 years ago.
I searched the internet and some people swear that if a plug is flooded once, it's not good anymore. I found it difficult to believe, but my story seems to confirm that.
Now, plugs are cheap, so these will go in trash, but why is it?
This is the only explanation I could find:
http://www.gsparkplug.com/shop/fouling-shortingout-problem-modern-plugs-champion-vs-ngk/
I washed them in solvents, dried, and got exacrly the same results. Seems permanent failure. The plugs are in good shape, not oiled, carboned, etc. Some superficial corrosion on the outside coating though. They worked fine when boat was put to storage 2 years ago.
I searched the internet and some people swear that if a plug is flooded once, it's not good anymore. I found it difficult to believe, but my story seems to confirm that.
Now, plugs are cheap, so these will go in trash, but why is it?
This is the only explanation I could find:
http://www.gsparkplug.com/shop/fouling-shortingout-problem-modern-plugs-champion-vs-ngk/
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