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Electric EZGO Electric EZ GO Marathon, Medalist, TXT and RXV.



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Old 06-20-2010, 11:23 AM   #1
ZOG
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Default Marathon resistor cart conversion

I purchased a 1989 marathon two person cart a month ago for $350.00.
The idea was just to use for around the property, for gardening and lawn work, ect. That was until I came across BGW now the transformation begins.
I built a lift kit, scored a deal on wheels and tires, and painted the baby blue cart flat black. I purchased 6 interstate U2400 batteries and made new 2ga wires. I took the motor apart and the brushes and com are like new. All the connections are good as far as wires and mount studs. I was tooling around my yard this weekend and noticed the solenoid and wire coming off the sliding contact are showing signs of high amp load ( BLUE). I have some tall hills to climb. I was going to get the plum quick motor then I came across the two speed EMP. looking for some opinions between the two. I would like to keep it as low budget as possible. I do have a new 36 volt Curtis controller out of a forklift that I could use, but it is for separately excited motor. Is there a motor you might know of that would fit in that axle that is Sep-Ex?
I know a lot of you have been in my shoes and I am hoping you can tell me the best way. I should say I am not apposed to the resistor but think with more power it might be two jerky and not be able to take the amp load.
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Old 06-20-2010, 11:37 AM   #2
scottyb
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Default Re: Marathon resistor cart conversion

You are right to worry about the resistor set up with higher amps.... For you the best upgrade would be to add 2 more 6v batteries and go to a 48v controller system. It would give you good results. Any increase is going to cost you.
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Old 06-20-2010, 02:24 PM   #3
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Default Re: Marathon resistor cart conversion

So keep the stock motor run by 48 volt controller vs. 36 volt controller and emp motor? I guess I could build up the back to hold two more batteries. what would be a good amp controller? 400?
Thanks
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Old 06-20-2010, 04:09 PM   #4
buckmanmike
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Default Re: Marathon resistor cart conversion

400amp controller should be suffiecient unless you are planning on huge tires and do a lot of mud and hill riding Alltrax makes a programmable controller that you can set to "ramp up" real fast. i.e. send a lot of amps to motor at slight pedal pressure. I have a Logisystems controller on my resistor to solid state conversion and it has served me well and is cheaper than Alltrax. Good luck.
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Old 06-20-2010, 04:26 PM   #5
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Default Re: Marathon resistor cart conversion

buckmanmike
My tires are 22x9x10, do you have the stock 2hp motor or did you upgrade?
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Old 06-20-2010, 05:18 PM   #6
scottyb
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Default Re: Marathon resistor cart conversion

I have used the Logisystem 480 amp controller with good results also 89 CC converted to 48v (6-8v) 4" lift on 22s
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Old 06-20-2010, 06:27 PM   #7
rabbitreborn
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Default Re: Marathon resistor cart conversion

Quote:
Originally Posted by ZOG View Post
buckmanmike
My tires are 22x9x10, do you have the stock 2hp motor or did you upgrade?
Those 2 HP motor's are tough buggers.....

Alot of people here seem to feel that it's ok to do an upgrade to 48 volt and retain the stock 36v motor (which is perfectly ok to do). I however feel if you are upgrading your cart it should be done all the way (even if that means coming back at a later date to finish the upgrade), and I would always advise to upgrade the motor to a higher HP one. I know that budgets don't always allow for upgrading all that at once, but I still feel if you are doing it, you might as well plan for a future upgrade to the motor and in doing so, plan your upgrade to the wiring accordingly. For example, if you plan for a 400-500 amp motor, run 4 gauge welding cable, if you are going extreme and are doing a 600+ amp controller with a 8HP+ motor, I would suggest 2 gauge welding cables.
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Old 06-20-2010, 08:03 PM   #8
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Default Re: Marathon resistor cart conversion

i also have the logisystem 480 . while still at 36 volts with 4 ga wires and

hd fnr and hd contactor. it runs better than stock. next step is just slap in

two more batts. and good to go. it is not hard to do and feels good on your

butt after each little bump. most also these little upgrades are way

less expensive than hot rods. jim
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Old 06-20-2010, 08:44 PM   #9
huntinghawk
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Default Re: Marathon resistor cart conversion

OK ZOG, I'm going threw the same thing but building from scratch a 1977.

Curtis PB-6 ($130 from Mike's) replaces accelerator board.
Curtis controller ($265 from Mike's Alltrax 400amp) replaces resistor coils.

In addition you will have to upgrade the FNR switch to handle the higher amperage & a heavier duty solenoid that will handle 48v & the amperage.

Plus you will have to get a 48v charger & matching plug. Receptacle/plug for 36 & 48v are different.

Six 8v batteries will give you about the same run time you have now. Eight 6v batteries will give you maybe 20% more run time.

Ross
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Old 06-20-2010, 10:25 PM   #10
ZOG
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Default Re: Marathon resistor cart conversion

Thanks for all the advice, This is my plan at least until it changes. heavy duty fwd/rev, HD solenoid 36volt, new 400-500 amp controller 36-48 volt, Curtis PB-6, and EMP 2 speed motor. I do not think I want more than 6 batteries, so I think the 2 speed motor will probably be the same as 48 volt (with stock motor) and cost will be the same. When my batteries do go out, I will switch to 48 volt and switch the solenoid at that time.
at that time I will have to get a 48 volt charger also
Thoughts? What am I Missing? Last question has anyone mounted speakers and a radio in a older Marathon?
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