# 851287 O-Ring | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta o-ring from the Marine Propulsion group, listed for 38 applications across the MD, AQ, BB, B, MB and AQD series.

## 🚤 Compatibility

-   **Engine Family:** MD, AQ, BB, B, MB, AQD

Full model list at the end of this description.

## ⚙️ Key Features

-   38 applications across six engine series
-   Marine Propulsion group seal

## 🔌 Function

Seals the joint by being squeezed into its groove, keeping oil in and water out of the housing.

## ⚠️ Common Signs of Failure

-   Oil weeping or dripping from the joint
-   Milky or emulsified oil where water has got in
-   Oil level dropping between checks
-   Ring found nipped, split or flattened on removal
-   Ring hardened so it no longer springs back

## 🛠️ Service Notes

-   Sliding sleeve 850303 shares the same 38 application listing, so this ring is often disturbed in the same strip-down
-   Lubricate the ring lightly and make sure it is not trapped as the housing pulls up

## 📦 Condition

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

## 🔎 Full Model Compatibility

Typically suits:

-   Volvo Penta AQ130C, AQ130D, AQ130A, AQ130B
-   Volvo Penta AQ170B, AQ170C, AQ170A
-   Volvo Penta BB115A, BB115B, BB115C
-   Volvo Penta BB170B, BB170C, BB170A
-   Volvo Penta MB20A, MB20B, MB20C
-   Volvo Penta MD5A, MD5B, MD5C
-   Volvo Penta AQ115A, AQ115B
-   Volvo Penta AQD21A, AQD21B
-   Volvo Penta MD11C, MD11D
-   Volvo Penta MD17C, MD17D
-   Volvo Penta MD21B, MD21A
-   Volvo Penta MD6A, MD6B
-   Volvo Penta MD7B, MD7A
-   Volvo Penta AQ165A
-   Volvo Penta B20
-   Volvo Penta BB165A
-   Volvo Penta MD67C
-   Volvo Penta 110S

## Details

- **Price:** 14.08 AUD
- **Vendor:** Volvo Penta
- **Type:** Gaskets & Seals
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 14.08 AUD | In stock |

## Images

- 851287 O-Ring | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/851287-o-ring-genuine-volvo-penta)
> Updated: 2026-09-19