Hello Plow Hand, You will seldom find a volt reading stated with a temperature associatted with the reading. At 13V you are above battery voltage, so it is charging. It will eventualy go to 14V I'm sure. At 0 degrees you only have 65% of the battery capacity available for crancking the engine, SOOO at 13v she Is charging as much as the battery will take the charge. It is harder to charge a battery at -5 than at 70 degrees, that explains the lower initial voltage. At -5 below I would be close to a log about to go into the fire! Stay warm.........Guido.
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Today's Featured Article - Restoration Story: Fordson Major - by Anthony West. George bought his Fordson Major from a an implement sale about 18 years ago for £200.00 (UK). There is no known history regarding its origins or what service it had done, but the following work was undertaken alone to bring it up to show standard. From the engine number, it was found that this Major was produced late 1946. It was almost complete but had various parts that would definitely need replacing.
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