john deere A do i need a resistor

gary in neb. · Sep 10, 2012

switching an A over from mag to dist. my 60 has a resistor, but my other A does not. do i need one to help keep buring up the points?

rvirgil_KS · Sep 10, 2012

if battery is 12 volts and coil is 6 volt or marked "12 volt external resistor required" (1 1/2 ohms across coil primary) yes you need a resistor. Resistance of the resistor should equal resistance of coil primary

if 6 volt battery with 6 volt coil, or 12 volt battery with a direct 12 volt coil (3 ohm primary) no, you do not need a resistor

gary in neb. · Sep 10, 2012

will be 12 volt bat and 12 volt coil so should be ok then. wonder why my 60 has then as it's all 12 volt.

J.Wondergem · Sep 10, 2012

Maybe your 60 don't have a coil with a internal resistor.

rvirgil_KS · Sep 11, 2012

60 probably has resistor bypass from switch or starter. Operates on 6 volts but bypasses resistor and applies 12 volts while starter is cranking the engine to give hotter starting spark.

There is no internal resistor in the coil. The difference is in the number of primary and secondary windings.

J.Wondergem · Sep 12, 2012

Wonder why my coil is stamped on the outside of the case, " internal resistor " ??

wilson ind · Sep 13, 2012

did you live near westcliff colorado few years ago???

gary in neb. · Sep 14, 2012

nope. always been a nebraska boy.

john deere A do i need a resistor

gary in neb.

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gary in neb.

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