# 947789 O-Ring | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta o-ring listed for 8 applications on MD and AQD series engines. Nothing beyond that fitment is published against it — no weight, size, variant or supersession — which makes it the hardest of the four MD/AQD o-rings in this run to pin down from the listing alone. The other three are 946742, which supersedes 945214, 946743, which supersedes 945215, and 946781, which is tied to the MD11C/100S and MD17C/110S specifications. If your old number or engine specification matches one of those, order that part instead.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta MD1B
-   Volvo Penta MD2B
-   Volvo Penta MD3B
-   Volvo Penta MD11C
-   Volvo Penta MD11D
-   Volvo Penta AQD2B
-   Volvo Penta MD17C
-   Volvo Penta MD17D

-   **Engine Family:** MD, AQD

## ⚙️ Key Features

-   8 applications on MD and AQD series engines
-   One of four MD/AQD o-rings here with 946742, 946743 and 946781
-   Quantity varies by assembly, most commonly one

## 🔌 Function

Seals a static or slow-moving joint by squeezing into its groove.

## ⚠️ Common Signs of Failure

-   Weeping or dripping at the joint
-   Ring flattened, hardened or taking a permanent set
-   Nicks or a twist from assembly
-   Ring swollen or gone soft from the wrong fluid

## 🛠️ Service Notes

-   Measure the ring you are removing and check the old part number first — the four MD/AQD o-rings here are not separated by their published listings
-   Order by part number against the parts list position rather than by eye

## 📦 Condition

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

## Details

- **Price:** 14.55 AUD
- **Vendor:** Volvo Penta
- **Type:** Gaskets & Seals
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 14.55 AUD | In stock |

## Images

- 947789 O-Ring | Genuine Volvo Penta Part
- 947789 O-Ring | Genuine Volvo Penta Part - photo 2 of 2

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/947789-o-ring-genuine-volvo-penta)
> Updated: 2026-10-08