Yamaha G19 hesitating on acceleration

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  • Yamaha G19 hesitating on acceleration

    Just bought a Yamaha G19 electric cart a week ago. First time out in the middle of the day, noticed a little slight 1second delay when stepping on gas, attributed it to not knowing the cart. Next day, left at 7am, got up to the golf course, stepped on the gas, got a little buzzing sound, very slight movement. If you kept your foot on the gas for several (10+) seconds, the cart would move perfectly normal. You could ease off the gas and go again with no problem, but if you let completely off of it, you were back at square 1. After an hour of checking wires, we loaded up went home. When we got home, cart ran perfect. Found a loose connection, plugged it in, thought that was the problem. Ran the cart all week after work, no problems at all. Left for the golf course with fully charged cart at 7am the next morning, get there, exact same thing as last weekend. The cold was obviously having an impact on a larger issue. We wiggled a wire, not hard, cart then completely lost power, no more reverse buzzer.

    Very frustrating, any ideas. We were thinking solenoid, as the last times we turned the key to the on position we were getting no "click". Would a solenoid going out cause total power failure?? Upon inspection, it has a 2002 controller in it, the batteries are newer (less than a year old), and the solenoid was the only really crusty looking thing on the cart.

  • #2
    Hello karenms22, first off I would run a load test on the batteries as soon as you get it running. To your current situation, if the solenoid terminals are crusty, take a note of the wiring then disconnect everything and clean it up. If you have any spinning posts, replace the solenoid. If the solenoid is clean, and the batteries are charged and it is not working, jump the solenoid by running a 6 gage wire across the 2 large terminals.
    Regards

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    • #3
      OK....so after a lot of checking of solenoid, motor, etc. We came back to the fuse. We had checked it and it appeard to be OK, but upon closer inspection, it actually was blown, just hard to see because of where the break occurred.

      Of course because the cart has been in the garage, it will run fine. The next question is, why is the cart hesitating to go after the ride sitting on a trailer in the morning on its way to the golf course. What about the cold is causing that. Haven't tested since the fuse was changed, but at the same time, I am afraid to. I do not see how the fuse would cause that.

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      • #4
        Hey. How much of a hesitation are you getting? What is the temperature out there?
        Regards

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        • #5
          When its warm out, no hesitation, runs normal. In the morning after towing it about 20 miles on a trailer, 10 seconds +. Its not all that cold 60 degrees. Comfortable in shorts and a pullover jacket.

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          • #6
            Did you check to see if the throttle positioning sensor is functioning correct? Did you run a load test on the batteries? Also, sometimes the hesitation could be due to some type of a controller malfunction. Does running a load on the batteries make the hesitation less? (example, turning on the lights)
            Regards

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            • #7
              Batteries have been tested and all are very good. The cart runs like a champ until the tow in the morning. The times we had driven it had been in the afternoon when its 80 degrees out. We do not have lights or any other accessories hooked up to it. Could it be something sticking due to the cold? Maybe it is the throttle positioning sensor? we will have to check that. My initial thought is that it was a conncection where the cold shrinking the metal was exposing a bad connection, when it gets warm the metal expands and reestablishing a connection.

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              • #8
                Has the cart failed after the fuse was replaced?

                From the description of the fuse failure it sound as if it was a fatigue fracture failure and not a short circuit failure. I have seen several of these over the years in the automotive world. The vibration from the trailer ride coupled with the cool temperature could create the symptoms you described.

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                • #9
                  Cart seems to be fine now.....such a simple fix, I want to believe its true. Have not had a chance in the mornings to tow and test. Hopefully it is that simple!!!!! The break in the fuse was so hairline, its unbelieveable.

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                  • #10
                    Good find on that fuse crack, hopefully that fixes your problems
                    Regards

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