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Re: Hotter spark plug

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Author  [Modern View]

05-03-2013 07:11:22

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If it is clear and wet and smells like gas it is probably gas. But that plug is not fouled. It is wet because that cylinder is not firing. Start the tractor, listen to it run. Now disconnect that "fouling plug" wire. Bet there isn't any differenc. Now check for big blue spark on that plug. Got one?

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Bob Reineke

05-03-2013 08:20:58

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 Re: Hotter spark plug in reply to GordoSD, 05-03-2013 07:11:22  
It's NOT firing and has what looks like a strong spark but it's not blue. Iv'e checked the points the distributer cap, wire all looks good.

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Indiana Ken

05-03-2013 18:20:55

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 Re: Hotter spark plug in reply to Bob Reineke, 05-03-2013 08:20:58  
You stated you have checked the wires, distributor cap etc. I have had carbon tracks on coil towers and inside distributor caps, they are hard to see and inside the cap they can prevent firing on a single cylinder. I have had bad wires that looked good and actually checked good with a ohm meter. Checking the spark by pulling the wire and watching the spark jump to ground does not always mean it will fire inside the cylinder under compression.

If your other plugs look good, if it were me, I would replace the distributor cap, rotor and wires with new ones. If that does not fix the problem then I would look else where. Good luck.

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Bob Reineke

05-03-2013 21:05:03

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 Re: Hotter spark plug in reply to Indiana Ken, 05-03-2013 18:20:55  
Thanks for the info

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05-03-2013 18:04:33

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 Re: Hotter spark plug in reply to Bob Reineke, 05-03-2013 08:20:58  
Replace the wire, replace the plug. Start new thread, "no fire one cylinder"

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John M

05-03-2013 12:39:09

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 Re: Hotter spark plug in reply to Bob Reineke, 05-03-2013 08:20:58  
Bob, pull the plug wire off just enough so that the metal end on the wire and the metal either on the cap or the plug end dont touch, say like 1/8 inch. See if it still does it. Im betting on a bad cap. Those cracks can be hard to see.

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Bob Reineke

05-03-2013 21:06:43

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 Re: Hotter spark plug in reply to John M, 05-03-2013 12:39:09  
OK I'll try that, thanks

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