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Electric EZGO Electric EZ GO Marathon, Medalist, TXT and RXV. |
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08-08-2017, 02:17 PM | #1 |
Getting Wild
Join Date: Sep 2009
Location: Aubrey, TX
Posts: 88
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93 Marathon will only go like 5mph
I have a 93 Marathon that will only top out at about 5mph.
Has new f/r and new throttle box. Battery pack is at 38.24 volts and drop to 37.64 at full throttle. Could it be the controller? |
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08-09-2017, 06:34 AM | #2 |
Getting Wild
Join Date: Sep 2009
Location: Aubrey, TX
Posts: 88
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Re: 93 Marathon will only go like 5mph
Bump
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08-09-2017, 08:21 AM | #3 |
Gone Wild
Join Date: Sep 2016
Location: Northern California
Posts: 1,300
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Re: 93 Marathon will only go like 5mph
Hopefully you'll get some good help here soon. But in the meantime, have you checked all cables to see that they're not loose, damaged, corroded? Anything getting hot?
I'm not sure if there is a sticky above for the marathon, but that would be a good place to start. Do you have a dvm? |
08-09-2017, 08:23 AM | #4 |
Getting Wild
Join Date: Sep 2009
Location: Aubrey, TX
Posts: 88
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Re: 93 Marathon will only go like 5mph
Yes I have a dvm just not sure what to test
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08-09-2017, 08:46 AM | #5 |
Gone Wild
Join Date: Sep 2016
Location: Northern California
Posts: 1,300
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Re: 93 Marathon will only go like 5mph
The marathon is a series drive, correct?
Assuming all of your high amp cables are in good shape? Here's the link to the "sticky" I was talking about. It should work for your marathon, correct? http://www.buggiesgonewild.com/elect...agnostics.html If the cart is going (even though very slowly) the low voltage side is working. You need to follow the path of the big cables, starting with the pack, and seeing where you're losing voltage. Disclaimer *** I'm just repeating, hopefully correctly, what I've read here. However, I'd start with the tests in the sticky while you're waiting for help. |
08-09-2017, 08:56 AM | #6 |
Gone Wild
Join Date: Sep 2016
Location: Northern California
Posts: 1,300
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Re: 93 Marathon will only go like 5mph
***current
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08-12-2017, 01:30 PM | #7 |
Getting Wild
Join Date: Sep 2009
Location: Aubrey, TX
Posts: 88
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Re: 93 Marathon will only go like 5mph
I did the testing and when putting the dvm leads on the B- and M- it says the voltage should drop to zero. I do not get that. I go from 38.10 to 24.5.
Does this sound like it needs a rebuilt controller? |
08-12-2017, 10:21 PM | #8 |
Over This Interview Is...
Join Date: Jun 2012
Location: AZ
Posts: 17,449
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Re: 93 Marathon will only go like 5mph
Pull terminals 2 & 3 off controller, they will be black & white wires. Check them with the ohms scale on your meter that will cover the 5000 ohm range. You should get a low number when pedal is at rest (like 150), it should Increase smoothly to around 4700-5000 at full throttle. I'm thinking it may not be getting a full throttle signal.
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08-13-2017, 12:20 PM | #9 |
Getting Wild
Join Date: Sep 2009
Location: Aubrey, TX
Posts: 88
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Re: 93 Marathon will only go like 5mph
I get 207 at rest and 2332 at full throttle.
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08-13-2017, 01:49 PM | #10 |
Happy Carting
Join Date: Dec 2007
Location: Southern California
Posts: 73,358
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Re: 93 Marathon will only go like 5mph
This sounds like 1/2 speed reverse is activated all the time.
1/2 speed is active when ever the 2 wires going the the reverse micro switch are touching each other.... remove one wire from the switch and test the cart. If that fixes the cart them replace the micro switch or repair the wires. |
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