When the points are closed, the current draw is so high it would kill the little 9 volt battery before you could start it. Once running it would be ok, because the amount of time the points are open versus how long they are closed coupled with the collapsing of the field in the coil producing back EMF will drastically reduce the current required. Now that I have explained why the 9 volt battery will not work, what will work is getting a battery holder from Radio Shack and using 4 D or C cells in series, or one of the 6 volt lantern batteries. I have done that and run tractors several hours on the 6 volt lantern batteries. You can even buy rechargeable lantern batteries or C or D cells if you chose to go that way.
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Today's Featured Article - History of the Nuffield Tractor - by Anthony West. The Nuffield tractor story started in early 1945. The British government still reeling from the effects of the war on the economy, approached the Nuffield organization to see if they would design and build an "ALL NEW" British built wheeled tractor, suitable for both British and world farming.
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