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Unread 03-08-2019, 11:04 PM   #1
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Default 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 itís running. What are the chances that itís 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 itís running.


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Unread 03-09-2019, 06:55 AM   #2
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Default 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.
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Unread 03-09-2019, 07:13 AM   #3
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Default 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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Unread 03-09-2019, 08:10 AM   #4
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Default 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.
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Unread 03-09-2019, 08:23 AM   #5
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Default 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/
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Unread 03-09-2019, 08:30 AM   #6
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Default 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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Unread 03-09-2019, 01:36 PM   #7
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Default 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. Thatís some good info thank you.


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Unread 03-11-2019, 09:18 PM   #8
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Default Re: Starter generator bad out of the box!

So itís 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 wasnít 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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