Shoprider Sprinter Jumbo 3 Logo
Posted on Feb 14, 2010
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My shoprider cobra loses speed when I am on top speed.

It slows down a lot every 5 sec. or so when I am going downhill, and less often uphill.

Is this an electronic problem?

Thanks a lot,

mz

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  • Expert 177 Answers
  • Posted on May 30, 2010
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Joined: May 27, 2010
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Hi. Does the machine do this more soon after removing the machine off the charger? When a mobility scooter is going down hill, the controller feeds the voltage generated by the motor back into the batteries. When I an testing machines here at the workshop, I have seen cases where 10 to 12 amps is going back into the batteries on a down hill run. If the batteries are fully charged or unable to take much current, the controller slows the scooter right down to limit the higher voltage generated.
It might pay to check the battery leads and connectors as well, and get the batteries tested.
While you are driving along, try moving the speed lever slowly up and down, not in and out as you normally use it. Sometimes a faulty speed pot ( wig wag ) will cause the speed to change.
Good luck. Neil.

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