Marathon Throttle Issue

G8RDave · 02-03-2014, 05:12 PM

I have a Marathon series cart that I converted from 36v to 48v about 4 years ago. I used a Logisystems controller. It worked perfectly until recently. Now, as soon as you touch the accelerator pedal it wants to hit full throttle. I originally thought it was the pot box going bad, but now I think it's the controller. I pulled the white and black wires off the controller to test the ohms (0-5). I forgot to turn off the key and as soon as I hit the throttle the cart took off. Without the pot box attached to the controller, should it do that? I eventually tested the pot box and it seems to be working right (although the ohms did go higher than 5, it did so smoothly).

If I need a new controller, what do you recommend since Logisystems seems to be out of business?

Is there something else I should check before dropping the cash on a new controller?

simple man · 02-03-2014, 10:24 PM

The cart should not run without the pot box being connected! I had a Curtis controller do the same thing. I won't swear the controller is bad, but you may be able to look up a testing procedure for it.

T.Hill56 · 02-03-2014, 11:28 PM

The controller is bad. You have an internal short between B- and M-

G8RDave · 02-04-2014, 05:45 PM

Ok, new controller is on order from ScottyB! Let's see if that fixes it.

G8RDave · 02-06-2014, 05:57 PM

Update- New controller arrived from ScottyB (super fast shipping btw). Got it installed and the cart works like a champ! Thanks, guys.

02-03-2014, 05:12 PM	#1
G8RDave Not Yet Wild Join Date: Apr 2009 Location: Tampa, Florida Posts: 18	Marathon Throttle Issue I have a Marathon series cart that I converted from 36v to 48v about 4 years ago. I used a Logisystems controller. It worked perfectly until recently. Now, as soon as you touch the accelerator pedal it wants to hit full throttle. I originally thought it was the pot box going bad, but now I think it's the controller. I pulled the white and black wires off the controller to test the ohms (0-5). I forgot to turn off the key and as soon as I hit the throttle the cart took off. Without the pot box attached to the controller, should it do that? I eventually tested the pot box and it seems to be working right (although the ohms did go higher than 5, it did so smoothly). If I need a new controller, what do you recommend since Logisystems seems to be out of business? Is there something else I should check before dropping the cash on a new controller?

02-03-2014, 10:24 PM	#2
simple man Gone Wild Join Date: Aug 2011 Location: Bunnell, Florida Posts: 2,408	Re: Marathon Throttle Issue The cart should not run without the pot box being connected! I had a Curtis controller do the same thing. I won't swear the controller is bad, but you may be able to look up a testing procedure for it.

02-03-2014, 11:28 PM	#3
T.Hill56 Not Yet Wild Join Date: Jan 2014 Location: Tucson, Az Posts: 45	Re: Marathon Throttle Issue The controller is bad. You have an internal short between B- and M-

02-04-2014, 05:45 PM	#4
G8RDave Not Yet Wild Join Date: Apr 2009 Location: Tampa, Florida Posts: 18	Re: Marathon Throttle Issue Ok, new controller is on order from ScottyB! Let's see if that fixes it.

02-06-2014, 05:57 PM	#5
G8RDave Not Yet Wild Join Date: Apr 2009 Location: Tampa, Florida Posts: 18	Re: Marathon Throttle Issue Update- New controller arrived from ScottyB (super fast shipping btw). Got it installed and the cart works like a champ! Thanks, guys.

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