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My yamaha generator (EF6200PDEX) does not charge the battery when it is running. I can only get around 10.6 volts with my meter. Would this be the regulator or maybe the charge coil it self.
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Hi Brian, get a digital volt meter and start the ATV measure the voltage at the battery or at the alternator it should read around 14 volts when charging, if it reads 12 volts the charging system is not working, check or a blown fuse or broken wire, if you can access the alternator directly measure at that point. It takes 14 volt output from the alternator to charge a 12 volt battery
It is corrected properly, right? + to the wiring harness and - to ground ... right? Are you certain about the rectifier? Is the battery charged at this time?
You know a alternator cannot make power unless you first put power into it ... right? Alternators (unlike most generators) are not self exciting. If your battery is weak or "dead", the alternator cannot make electricity to charge the battery. I don't know what the rating of your alternator is. Your battery should be fully charged before you do any more tests. If you have a 1 amp charger, allow at least 10 hours for a full charge. Don't cook your battery with a big, powerful, fast charging automotive battery charger.
Good luck with your repair ... I hope you find this response helpful.
With the engine running at about half power/speed, put a volt meter across the battery terminals. The meter should read somewhere around 14.5 volts. If it is below 13 volts it is definitely not charging. Consider that the battery, unless new, could also be failing.
The generator will produce ac voltage not dc so the meter needs to read ac voltage. the readings need to be taken between the three wires using two at a time until all combinations have been tried. readings should all be the same. Engine will have to be run at about 5000rpm while readings are obtained. Other possible problem could be the regulator / rectifier unit breaking down when hot.
If your charging system is working, you can disconnect the battery while it's running, and it will stay running. The stator assembly (Like a car alternator) will supply the current to keep the bike running along with charging the battery. A multi-meter should show around 12.5 volts at the battery with the engine off, and just under 14 volts running, under normal working conditions.
I dont believe this bike has a rectifier, just a generator, located in the bottom forward engine case. You can test the generator by charging the battery, put the bike on the center stand, attach a DC volt meter to the pos and neg of the battery and run the engine, the volt meter will show 13.6 - 14 volts if the generator works. It is possible you got a battery with a dead cell causing it to never get fully charged... sometimes they're dropped during shipping and other handling. charge the battery and check the voltage, if it seems good, take it out bring it to an auto store and ask them to load test the battery, theyll do it free at most places. if it fails...the battery you got was a dud, take your receipt to the store you bought it and explain what happened and they should honor their service and replace it free. good luck. if the bat is good and the alternator is not charging there are a few other directions to go...
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