Posted by Janicholson on September 12, 2012 at 15:21:42 from (96.24.99.126):
In Reply to: 6 volt issues posted by Brad Metcalf on September 12, 2012 at 14:05:24:
With 1000cca, the voltage drop is worrisome. The starter, on first cold start should draw about 350 amps for an H Farmall, and 425 or so for an M. Every auto store sells a starter draw meter for less than $20. To determine if your switch is causing the issue you need to measure across it with the volt meter (might be the 2 volt setting, because you are measuring drop, not battery volts. Another way of doing this is to measure cranking voltage across the battery when cranking, and then at the starter to ground when cranking. If they match, and are both in the 4.5 range, then one of three things are wrong. The new battery is not charged, and or not good (been there). or the starter is dragging, (rebuilt is defined by the rebuilder) or the engine timing is advanced and the combustion pressure is causing it to be very difficult to push over TDC. The Amp meter mentioned above is a sure detective in this search. Jim
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