1977 Marathon full out

[Marathon1977]

Hello all. I am new to the forum. I have just purchased a 1977 Marathon EZGO with a Robin EC25DS 244cc motor. I am new to golf carts, but I am pretty mechanically inclined. Anyway, the cart runs great at full speed. In fact, it's probably one of the fastest carts I have ever been on. The problem lies in when I try and run slower than full speed. The cart surges and I find myself tapping the pedal. It will not run smooth at lower speeds at all. Could this just be a carburetor adjustment, or is there something I don't know about these things? I would appreciate any help anyone could give me. Thank you.

 

[HotRodCarts]

Welcome to the forum.

What does the cart do at slower speeds? It's possible it could just need the throttle cable adjusted.

 

[Marathon1977]

At slower speeds the cart surges, like the motor is engaging then disengaging. It doesn't want to run slower than full speed. I will check the linkage, but the motor does not run at full speed until the pedal is pushed 3/4 the way down. At 1/3 - 3/4 the way down the cart surges and will not maintain a constant speed. Thanks for your help on this.

 

[junglejoe39]

Im having the exact same problem with a cart I just purchased. I noticed there seem to be 2 sets of points under the flywheel cover. Im thinking that 1 set is for forward and the other for Reverse. Mine seems to run better in reverse so Im thinking 1 set of points. If I find this to be true Ill let you know