Polarize before running. You need to check the voltage at the armature terminal with engine running. If you have less than 6.6 volts it will not close the cut out relay which connects the battery to generator. In that case, ground the field terminal of generator, this will by pass the regulator section and allow for full uncontrolled charge. If it still does not build voltage you have generator problems. If it is over 6.6 volts, and the relay does not close it needs to be adjusted to lower the closing voltage. The set of points that are open when engine is shut off is the cut out and the set of points that are closed is the regulator part of the system. You adjust closing voltage depending on model of regulator. Most have to bend the spring arm, some have a screw. Caution, not a good idea to allow points to close when you are making this adjustment as arcing will occur and damage the points so disconnect wire on batt terminal of regulator. Also, when making any adjustments always make sure they reopen immediately when engine shuts down. You may have to adjust the third brush but it may not be adjustable and it is also supposed to be adjusted to control the maximum charge rate and not closing voltage of the cut out. Remember, two units, one is regulator, one is cut out, both under same cover.. Totally different functions. It is not uncommon, with today's rebuilt generators in particular, for the brushs to make poor contact thus poor start up performance. When you zap it while running it wakes up those connections and it may work until shut down. Usually caused by high mica on the commutator.
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