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D17 Eating points

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mokicker

07-07-2008 19:39:45




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Points burned up and I knew regulator was bad so I changed regulator, points, condenser, rotor, etc. Now a week later, new points burned up. Any clues?




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mlpankey

07-08-2008 06:48:59




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 Re: D17 Eating points in reply to mokicker, 07-07-2008 19:39:45  
if voltage is staying on the points it will burn them up or no resistor or bad resistor between the coil remember 6 volt points sometimes 12 v hot coils get em. then again d17 are newer than wds so they may have had 12 volt system from factory im not for sure if they did disregard all that if they came with 12volt systems.



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John T

07-08-2008 06:28:49




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 Re: D17 Eating points in reply to mokicker, 07-07-2008 19:39:45  
I tend to agree with Old there, an improper sized or bad or bad grounded condensor can cause premature point failure BIG TIME.

Overcurrent can also cause premature point failure, so if youre at 12 volts make sure you have EITHER a full true 12 volt coil (some call internally ballasted) OR ELSE if a 6 volt coil then a series voltage dropping (12 to 6) external ballast resistor wired after the ignition switch and before the coil. NOTE if you run a 6 volt coil at 12 volts (i.e. no ballast resistor) it will get HOTTTTTTTTT so hot you can barely lay your hand on it once warmed up PLUS burn up the points quickly......

John T

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Kip-Utah

07-08-2008 05:58:44




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 Re: D17 Eating points in reply to mokicker, 07-07-2008 19:39:45  
If tractor is 12 volt and you are using the wrong coil that can also burn points. You need one that has built in ballast resister with about 3 ohms resistance, or an external ballast resister that will accomplish the same. Kip



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mlpankey

07-08-2008 14:41:38




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 Re: D17 Eating points in reply to Kip-Utah, 07-08-2008 05:58:44  
glad to see your wc is pulling good



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Mokicker

07-08-2008 03:28:09




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 Re: D17 Eating points in reply to mokicker, 07-07-2008 19:39:45  
Thanks Old, I changed it also; but, wouldn't be first time I had a new one that wasn't good. I'll try a new one. Have a great day.

Carl



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old

07-07-2008 21:13:45




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 Re: D17 Eating points in reply to mokicker, 07-07-2008 19:39:45  
You stand about a 95% chance your condenser is bad. A condenser is a spark buffer for the points and when bad it causes the points to burn up very fast



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