# 856519 Spark Plug | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta spark plug from the Ignition and Control Systems group, weighing 0.057 kg and listed for two applications in the MB range. It supersedes 233981.

## ⚙️ Key Features

-   Ignition and Control Systems spark plug
-   0.057 kg
-   Two applications in the MB range
-   Supersedes 233981

## 🔌 Function

Delivers the ignition spark across its gap to light the charge in the cylinder.

## ⚠️ Common Signs of Failure

-   Hard starting, especially from cold
-   Misfire under load or a rough, uneven idle
-   Electrodes worn round, or the gap opened up
-   Insulator nose sooted black, oiled or glazed white
-   Fuel consumption up with no other change

## 🛠️ Service Notes

-   Renew plugs as a set rather than singly so all cylinders run alike
-   Check the plug's condition when it comes out - it reports on mixture and oil control as much as on itself

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   856519 → Supersedes 233981

### OEM / Related Numbers

-   233981 earlier number superseded by this part

## 📦 Condition

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

## Details

- **Price:** 35.72 AUD
- **Vendor:** Volvo Penta
- **Type:** Ignition & Controls
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 35.72 AUD | In stock |

## Images

- 856519 Spark Plug | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/856519-spark-plug-genuine-volvo-penta)
> Updated: 2026-09-06