1991 marathon electric

HOOD 1

Member
I am working on a 1991 marathon and when you apply the gas it will run fine. Apply the gas again and it acts like the batteries are going dead. It also jerks in reverse. then it will go back to running fine. Batteries are new, holding at 37.5 even under a load and have replaced potentiometer. My last guess would be the controller. Thanks for any help!
 
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