Posted by rvirgil_KS on July 31, 2017 at 06:25:26 from (8.36.242.2):
In Reply to: no spark posted by newhaven on July 31, 2017 at 04:43:17:
There are 2 kinds of "12 volt coils". One is marked "12 volts, external resistor required". It has 1 1/2 ohms across + - terminals which is equivalent to a 6 volt coil. An equal value 1 1/2 ohm resistor is required.
Other type is "12 Volt, No external resistor required". It has 3 ohms across + and -, and does not require a resistor.
I have seen some conversion kits that include a resister with too high an ohm value which will cause hard starting and perhaps low power. You can check it with an ohm meter or by bypassing the resistor for a short time.
If you are using the original coil check for rust in the large center terminal or a bulging case. If it has either I would replace it. I'd use the "no resistor required coil" and eliminate the resistor. Use NAPA IC14SB coil or equivalent.
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Today's Featured Article - Grain Threshing in the Early 40's - by Jerry D. Coleman. How many of you can sit there and say that you have plowed with a mule? Well I would say not many, but maybe a few. This story is about the day my Grandfather Brown (true name) decided along with my parents to purchase a new Ford tractor. It wasn't really new except to us. The year was about 1967 and my father found a good used Ford 601 tractor to use on the farm instead of "Bob", our old mule. Now my grandfather had had this mule since the mid 40's and he was getting some age on him. S
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