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Rick Kosmata

05-18-2002 23:19:14

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Can anbody tell me what the ohms of resistance there are in the primary ignition system of a D15 Series II (1963)?

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James (MO)

05-21-2002 18:22:41

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 Re: Resistance in reply to Rick Kosmata, 05-18-2002 23:19:14  
The shop manuals on 60's cars with point ignition systems say the primary circuit (coil, resistor, points) should draw approximately 3 amps with the engine off and ignition switch turned on. That will optimize point life. The same theory has worked well on the tractors I have converted from 6V to 12V. Just another way to approach it.

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Bryan Smith

05-21-2002 14:24:24

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 Re: Resistance in reply to Rick Kosmata, 05-18-2002 23:19:14  
Not off-hand, but I do know the coil has an internal resistor for that tractor. The info at Genesee Products suggests that any set-up converting 6 volts to 12 volts should have a coil-and-ballast-resistor combination of arounf 3.0 to 3.3 ohms. Not sure if the D15 coil/resisto combo is in this range, though.

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