#   Marine Battery Isolator Replacement Key - Red Key and Cap for RWB543   SP93

     [Previous](#)[Previous](#) [![SP93](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/300x300/SP93.jpg "Marine Battery Isolator Replacement Key - Red Key and Cap for RWB543")](https://www.rhsboating.com.au/images/com_hikashop/upload/SP93.jpg "Marine Battery Isolator Replacement Key - Red Key and Cap for RWB543")

 [Next](#)[Next](#)

   [![SP93](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/300x300/SP93.jpg "Marine Battery Isolator Replacement Key - Red Key and Cap for RWB543")](https://www.rhsboating.com.au/images/com_hikashop/upload/SP93.jpg "Marine Battery Isolator Replacement Key - Red Key and Cap for RWB543")[![aaa-1500x1500](https://www.rhsboating.com.au/images/com_hikashop/upload/thumbnails/300x300/aaa-1500x1500.jpg "Marine Battery Isolator Replacement Key - Red Key and Cap for RWB543")](https://www.rhsboating.com.au/images/com_hikashop/upload/aaa-1500x1500.jpg "Marine Battery Isolator Replacement Key - Red Key and Cap for RWB543")

    $7.78  each

            Brand: [AAA Marine Inspection Ports & Boat Accessories](https://www.rhsboating.com.au/brands-listing/category/aaa-marine-inspection-ports-boat-accessories.html)

 [+](#)

 [–](#)

 The add to cart button will appear once you select the values above

    ### Marine Battery Isolator Replacement Key - Red Key and Cap for RWB543

SP93 is the red replacement key and rubber cap for the RWB543 battery isolator switch.

Red replacement key for the specified battery isolator switch.

### Choosing and using this product

A spare isolator key is a useful service item when the original key has been lost, damaged or needs a backup for the boat's operating kit. Matching the replacement to the specified switch is the first step, because similar-looking isolator keys can have different operating profiles. Check the switch identification before ordering and keep that part number with the spare.

The supplied cap belongs with the replacement key arrangement. When inspecting the existing isolator, check the surrounding switch and cap condition as well as the key itself. If the original key has become difficult to use, establish whether the problem is with the key or the switch mechanism before deciding on the replacement needed.

As practical guidance, test the spare in the correct isolator under the vessel's safe operating procedure before relying on it away from shore. Follow the engine, battery and charging-equipment instructions when changing the switch state. Confirm that the key operates as intended and that the operator understands which circuit the isolator controls. Label the spare with a clear reference to the boat or switch position where useful.

Choose a storage place that is dry, easy for authorised operators to find and separate from loose tools that could damage the key or cap. Include the spare in pre-departure checks when it forms part of the boat's backup equipment. If the original is missing, review how keys are stored and returned after use so the same problem is less likely to recur. Keeping a matching spare available can simplify routine servicing, handovers between operators and preparation for the next outing, especially when the isolator is central to the normal starting and shutdown routine.

The red colour can help distinguish this key among the boat's other stored service items.

### Product details

- Includes rubber cap
- Suits RWB543