That alternator is an original delco-tron external mechanical regulaltor type. A 12 SI is near identical to a 10SI. It looks like some one has adapted a regulator right at the field terminals. Interesting. At any rate, I would follow advice of previous posters on alt. Far as coil, if you don't have an ohm meter, I am sure your friend who is checking alt has one, primary on a six volt coil will be less than 2 ohms and a l2 volt will be about 3 or 4 ohms. And no , it will not have any effect on the charging system, only ignition like short life of points if too much current flow or weak spark if not enough current flow through coil due to too much resistance.
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Today's Featured Article - Talk of the Town: How to Remove a Broken Bolt - by Staff. Another neat discussion from the Tractor Talk Discussion Forum. The discussion started out with the following post: "I have an aluminum steering gear housing with a bolt broken off in it. The bolt is about a 3/8" x 1 1/2" bolt. I've already drilled the center of the bolt out with about 7/64" drill bit the entire length of the bolt. Only one end of the bolt is visible. I tried to use an easy out but it wasn't budging and I didn't want t
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