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Gas EZGO Gas EZGO Marathon, Medalist, TXT and RXV. |
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03-09-2019, 12:04 AM | #1 |
Not Yet Wild
Join Date: Mar 2019
Location: GA
Posts: 4
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Starter generator bad out of the box!
I have a 91 2 stroke marathon I just replaced the starter generator because the original hitachi would only crank in reverse. The new eBay starter I bought is not charging and it is also draining a fully charged battery after a minute of driving like the starter is not dropping out once it’s running. What are the chances that it’s bad out of the box I am under the impression that if it will turn the motor over it should charge. I grounded the df terminal to check if it was charging and i only get 10 volts at the battery when it’s running.
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03-09-2019, 07:55 AM | #2 |
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Join Date: Aug 2013
Location: Ohio side of the Pennsylvania border.
Posts: 3,495
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Re: Starter generator bad out of the box!
The starter doesn't drop out once it's running. It switches to a power producer from a power consumer once it reaches a certain speed.
Which end of the df wire did you ground? It needs to be disconnected at the voltage regulator. |
03-09-2019, 08:13 AM | #3 |
Not Yet Wild
Join Date: Mar 2019
Location: GA
Posts: 4
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Re: Starter generator bad out of the box!
I disconnected the wire from df to the regulator at the regulator, and used it to ground the the df terminal
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03-09-2019, 09:10 AM | #4 |
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Join Date: Aug 2013
Location: Ohio side of the Pennsylvania border.
Posts: 3,495
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Re: Starter generator bad out of the box!
That configuration should be producing around 19 volts at speed.
I don't know why it's working as a starter, and not as a generator. Looking at the diagram, you can see it's nothing more than armature coils, and field coils. http://www.buggiesgonewild.com/attac...n-retrofit.jpg I guess if there was an internal short where the df wire connects to the field coil, it could kill the generator part. |
03-09-2019, 09:23 AM | #5 |
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Join Date: Aug 2013
Location: Ohio side of the Pennsylvania border.
Posts: 3,495
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Re: Starter generator bad out of the box!
I did a little searching, and found an interesting thread about tractor generators. Half way down, there is a long post by a guy named Al.
He knows what he is talking about. The only difference I can see is that golf cart starter/generators run in both directions. But, that is what a DC generator is all about. I'm going to study up a little more on the shunt coil for charging, and the series coil for generating. https://simpletractors.com/forums/to...-generator-or/ |
03-09-2019, 09:30 AM | #6 |
Test before replacing
Join Date: Aug 2013
Location: Ohio side of the Pennsylvania border.
Posts: 3,495
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Re: Starter generator bad out of the box!
One more thing. Check the green wire for continuity. If it's broke inside, the generator won't charge.
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03-09-2019, 02:36 PM | #7 |
Not Yet Wild
Join Date: Mar 2019
Location: GA
Posts: 4
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Re: Starter generator bad out of the box!
Right and you would think that since the + is running through the field coils before it gets to the armature the field coils would be ok. That’s some good info thank you.
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03-11-2019, 09:18 PM | #8 |
Not Yet Wild
Join Date: Mar 2019
Location: GA
Posts: 4
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Re: Starter generator bad out of the box!
So it’s fixed now. the problem was with the new s/g the f1 and f2 terminals were opposite of what the original hitachi s/g was so what was happening was the df coil wasn’t getting power the ezgo wiring diagram is not 100 percent correct as far as internal s/g wiring goes. This is how I believe the coils are actually wired IMG_0123.jpg
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