Generator or alternator? I have had alternators with leaky diodes, defective voltage regulators. Usually will discharge battery within a day or so. Alternator might become warm to the touch if discharging thru field coil. Had one where regulator would sense voltage drop on battery when door was opened and dome lite came on. Would then turn current on to field, even when the engine was off. Wife would typically get out of car, go around to passenger side, and grap purse, lunch bag, close doors and go in to work. By quitting time, battery was dead. If she grabbed her stuff and exited thru driver's door, wouldn't trigger VR. Don't think that was easy to diagnose. Went back to rebuild shop 3 times, got new VRs, and all were defective. Finally doug old VR out of the scrap box. No more trouble.
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Today's Featured Article - Tuning-Up Your Tractor: Secondary Ignition Wires and Distributor - by Curtis Von Fange. In our last episode we spent the entire day checking out the spark plugs. Is that efficency? Actually, it took more time to explain than it really did to do the inspection. At any rate we decided that a compression test was in order so we could verify the internal engine status. That way we wouldn't buy any tune up parts until we were sure that the engine was in reasonable mechanical condition. Our tests showed a fictional compression reading of 85, 80, 82 and 86 psi. That is well within a
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