# 40005559 O-Ring | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta O-ring from the Marine Propulsion group, weighing 0.091 kg. It supersedes part number 11989803. No engine fitment list is published against the current number, and at 91 grams it is a substantial large-diameter ring rather than a small seal.

## ⚙️ Key Features

-   Marine Propulsion group
-   0.091 kg, so a large-diameter ring
-   Supersedes 11989803

## 🔌 Function

Seals a joint between two parts by being squeezed into its groove, blocking the leak path.

## ⚠️ Common Signs of Failure

-   Weeping or seepage at the sealed joint
-   Ring flattened, nibbled or cut on one side
-   Ring hardened, so it takes a permanent set
-   Pressure loss from the assembly it seals

## 🛠️ Service Notes

-   Piston ring 40005557 also lists 11989803 as its superseded number, so one old number is claimed by both - order by the number your assembly calls for
-   Lubricate the ring and its groove on assembly and check the groove for burrs that would nick it

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   40005559 → Supersedes 11989803

## 📦 Condition

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

## Details

- **Price:** 7.34 AUD
- **Vendor:** Volvo Penta
- **Type:** Gaskets & Seals
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 7.34 AUD | In stock |

## Images

- 40005559 O-Ring | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/40005559-o-ring-genuine-volvo-penta)
> Updated: 2026-10-09