# 21689518 Switch | Genuine Volvo Penta Part

## 🔧 Product Description

Solid-state electronic bilge switch for automatic 12- or 24-volt pump control. It has no moving parts or mercury and is designed to resist oil, fuel residue and ordinary bilge debris.

## ⚙️ Key Features

-   12/24-volt operation
-   Maximum switching load: approximately 20 A
-   Activates at approximately 50 mm water depth
-   Deactivates at approximately 20 mm water depth
-   Approximately three-second delay reduces cycling
-   Solid-state oil- and debris-resistant design
-   System type: Automatic bilge-pump level control
-   12 V system

## 🔌 Function

Detects or switches the designated system condition and supplies the corresponding electrical signal.

## ⚠️ Common Signs of Failure

-   Incorrect or intermittent indication
-   No response at the switching point
-   Leakage or physical damage at the body

## 🛠️ Service Notes

-   Isolate the batteries before disconnecting anything, and label the leads as they come off so they go back on the correct terminals
-   Check the replacement matches the original for contact rating and action; a switch that cannot carry the load will burn its contacts
-   Clean the terminals, make the connections tight and dry, and support the loom so it is not left hanging on the switch body
-   Refit the seal, boot or gland that came with the switch — water getting in behind a switch is the usual reason they fail afloat
-   Work the switch through its full travel and confirm the circuit behaves correctly, including any interlock or alarm function, before the engine goes back into service

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   21689518 → Supersedes 41103012

### OEM / Related Numbers

-   41103011 earlier number superseded by this part
-   41103012 earlier number superseded by this part

### Other-Brand OEM Numbers

-   VOE21689518

## 📦 Condition

-   Genuine Volvo Penta part
-   Brand new
-   Supplied in original or equivalent packaging

## Details

- **Price:** 184.05 AUD
- **Vendor:** Volvo Penta
- **Type:** Sensors & Senders
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 184.05 AUD | In stock |

## Images

- 21689518 Switch | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21689518-switch-genuine-volvo-penta)
> Updated: 2026-10-08