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  #1  
Old 09-10-2018, 06:25 PM
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Default Odd Spark Issue

     

I have a 2005 Raptor 80. The spark plug arc is not jumping across the electrode like normal, it is actually arcing across the side of the plug just before the electrode bends around. I have the coil off and from the small wire to the ground I am getting around 1 ohm, on the spark plug wire end to the other I am getting 17k ohm, but I am not sure if either of these specs are within tolerance. Appreciate any information. Thanks.

EDIT: New OEM NGK spark plug.

Last edited by Jene; 09-10-2018 at 06:36 PM.
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Old 09-12-2018, 02:57 PM
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just put in a new plug
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Old 09-17-2018, 07:12 AM
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What is your gap set to?
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Old 09-20-2018, 05:21 PM
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spec...I think it was .027 Replaced coil...runs but still arcing from the side of the electrode.
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Old 09-21-2018, 07:23 AM
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How well does it run?
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Old 09-21-2018, 10:15 AM
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Starts and runs fine. A no-fire condition brought me to investigate spark when I found a weak spark from the side of the new OEM plug.
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Old 09-21-2018, 01:17 PM
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I could see it doing this if the plug was fouled, but a brand new plug...?
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Old 09-21-2018, 03:41 PM
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I know...exact OEM plug too.
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Old 09-22-2018, 07:24 AM
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Cracked plug insolator could cause this, but normally it would create a miss as well.

Paw Paw
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Old 09-22-2018, 10:44 AM
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Not sure exactly what helped, but it is arcing as it should now, but more a white color as opposed to the blue I am expecting.
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Old 09-22-2018, 01:16 PM
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Check your coil grounds for dirt or rust as the coil is no delivering full power. Also check the engine frame mounts for rust as that will effect the ground. Also check the plug cap.

Paw Paw
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