ces, you state "I've read that when a 12v conversion is done, the 6v coil isn't replaced for easier starts"
That can be true PROVIDED you add a series voltage dropping (12 to 6) external ballast resistor plus install/use a start ballast by pass system.
You cant simply use a 6 volt coil on a 12 volt tractor to achieve "easier starts" unless you add the external series voltage dropping resistor (or points burn prematurely and coil overheat) and to get those so called "easier starts" you have to install/use a by pass system that by passes the ballast while she's cranking so the coil gets unballasted battery voltage during that time.
So on a 12 volt tractor you can use EITHER a full true 12 volt coil OR ELSE a 6 volt coil plus a series voltage dropping (12 to 6) ballast. And if you want to improve cold weather starting you could use a 6 volt coil plus ballast BUT add a ballast while cranking by pass system.
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Today's Featured Article - A Lifetime of David Brown - by Samuel Kennedy. I was born in 1950 and reared on my family’s 100 acre farm. It was a fairly typical Northern Ireland farm where the main enterprise was dairying but some pigs, poultry and sheep were also kept. Potatoes were grown for sale and oats were grown to be used for cattle and horse feeding. Up to about 1958 the dairy cows were fed hay with some turnips and after that grass silage was the main winter feed. That same year was the last in which flax was grown on the farm. Flax provided the fibre which w
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