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292 Ralph
Regular
Joined: 24 Dec 2007
Posts: 33
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 Posted: Wed Dec 26, 2012 3:09 pm Post subject: ballast resistor |
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I need a parts number or replacement for the ballast resistor for six volts on a 9N tractor .Thanks Ralph
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Den N Ms
Tractor Expert
Joined: 20 Feb 2007
Posts: 2686
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| Posted: Wed Dec 26, 2012 3:27 pm Post subject: Re: ballast resistor |
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JMOR Answered that Question in the next post down.the stock (12250) resistor.
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Den N Ms
Tractor Expert
Joined: 20 Feb 2007
Posts: 2686
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| Posted: Wed Dec 26, 2012 3:33 pm Post subject: Re: ballast resistor |
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For Models 9N, 2N. Resistor measures .5 ohms.
(Part No: A8NN12250B)
$17.50
[/img]http://www.ytmag.com/store/parts/pics/A8NN12250B_sml.jpg
Last edited by Den N Ms on Wed Dec 26, 2012 3:41 pm; edited 2 times in total |
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HCooke
Tractor Expert
Joined: 29 Sep 2006
Posts: 3278
Location: Missouri
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| Posted: Wed Dec 26, 2012 4:41 pm Post subject: Re: ballast resistor |
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Available right here at Yesterdays Tractors
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jackinok
Tractor Expert
Joined: 29 Apr 2010
Posts: 2976
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| Posted: Thu Dec 27, 2012 11:48 am Post subject: Re: ballast resistor |
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when you measure a ballast resistor, be aware that the resistance changes as it heats up. it may read .5 ohms cold but that reading will be higher when it is hot. a regular resistor does not change, or changes very little. the reason for using this type resistor on a ignition is to give you a hotter spark when cranking.as it heats up the extra resistance helps save the coil. if your going to replace a true ballast resistor with a normal resistor , measure its resistance when hot for longest coil life.this throws a lot of folks off, for some reason.
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