Curtis PB-8 Pot Box Throttle, 0-5k 3-Wire With Micro Switch
- Fits electric carts and conversions whose controller takes a 3-wire 5k pot throttle
- 0 to 5k ohm 3-wire output with a built-in micro switch
- Lever arm links to the accelerator pedal by rod or cable
- Does not fit: carts with an E-Z-GO ITS inductive throttle sensor or a Club Car MCOR, which are different sensors
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Overview
A pot box is the throttle sensor on a cart with a solid state controller: a potentiometer in a metal case with a lever arm. The accelerator pedal moves the lever through a rod or cable, and the controller turns the changing resistance into smooth, stepless speed.
The Curtis PB-8 is the 3-wire version: a 0 to 5k ohm potentiometer with all three connections brought out, plus a built-in micro switch. Choose it when your controller's throttle input calls for a 3-wire pot.
A 5k pot can also feed a 0-5k two-wire input. Curtis's controller manuals describe the connection: use the wiper and one outer terminal so that resistance rises as the throttle is applied.
Compatibility
Fits
- Universal by throttle type Electric carts and conversions whose controller takes a 3-wire 5k pot throttle
- Voltage
- Not voltage specific
- Years
- Identify by controller
Links to the pedal by rod or cable
Does not fit
- Carts with an E-Z-GO ITS inductive throttle sensor or a Club Car MCOR, which are different sensors
- Installs that want a plain 2-wire pot box with nothing to work out (the Curtis PB-6 is the 2-wire version)
- Gas carts
Not sure which throttle your cart uses? Send us the controller model or a photo of the pedal area and we will match it. support@golfcartlab.com
How to confirm it fits
Check your controller's throttle input: this pot box suits a 3-wire 5k pot input.
If your controller has two throttle terminals for a 0-5k signal, the 2-wire Curtis PB-6 is the simpler choice.
Check that you have room for a rod or cable from the pedal to the lever arm.
Send us your controller model or a photo of the old throttle and we will check it for you.
What's in the box
- One Curtis PB-8 pot box with lever arm and built-in micro switch
- Attached 3-wire throttle cable
Completes the install
Optional
Replacing the controller too? This one reads the same throttle type.
Specifications
- Curtis
- PB-8
- Pot box throttle: potentiometer with lever arm
- 0 to 5k ohms, 3-wire potentiometer
- Built in
- New
Requirements and install notes
Disconnect the battery pack before you work on the throttle or controller wiring.
Mount the pot box so the lever arm lines up with the accelerator linkage, and set the linkage so full pedal travel gives full lever travel.
Identify the three wires with an ohmmeter before you connect them. The pair that reads about 5k wherever the lever sits are the two ends of the pot. The remaining wire is the wiper.
For a 3-wire throttle input, follow your controller's wiring diagram for the two ends and the wiper.
For a 0-5k two-wire input, Curtis's manuals say to use the wiper and one outer terminal so that resistance rises as the throttle is applied.
Curtis says every vehicle should have a throttle-actuated micro switch. Wire the built-in one into the pedal switch circuit shown in your controller's wiring diagram.
Fit a second return spring on the pedal and a pedal stop, as Curtis requires for its pot boxes, so the lever arm is never the only thing stopping the pedal.
FAQ
What is the difference between the Curtis PB-8 and PB-6?
Both are 0 to 5k ohm pot boxes with a built-in micro switch. The PB-8 brings out all three connections of the potentiometer. The PB-6 has a 2-wire output. Choose by the throttle input on your controller.
Can I use a 3-wire pot box on a 2-wire throttle input?
Yes. Curtis's controller manuals say any suitable 5k pot works with the standard 0-5k input when you connect the wiper and one outer terminal so that resistance rises as the throttle is applied. The third wire is left unconnected and insulated.
Will it replace an E-Z-GO ITS or Club Car MCOR sensor?
No. Those are different throttle sensors with their own connectors and signals. A pot box is for controllers that take a 5k potentiometer throttle.
What is the micro switch for?
It operates as the pedal starts to move, so the pedal switch circuit only turns on when you press the accelerator. Curtis says every vehicle should have a throttle-actuated micro switch, and having one built in saves fitting a separate pedal switch.
Warranty
This part is new and covered by our returns and refunds policy. We handle any claim for a defective part directly with you. Damage from a bent lever arm, water entry or incorrect wiring is not covered.
Manufacturer part reference
- Manufacturer part number
- PB-8
- GCL SKU
- 77-PB8
