# 21203185 Plug | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta threaded plug used in the exhaust-manifold or water-jacket service opening on selected 8.1-litre and V8 petrol marine engines. Any service replacement must preserve the original thread and sealing specification.

## 🚤 Compatibility

-   **Engine Family:** V
-   **HP Range:** 350-430 HP

Full model list at the end of this description.

## ⚙️ Key Features

-   Genuine Volvo Penta exhaust-system plug
-   Used in selected 8.1L and V8 petrol engine exhaust assemblies
-   Closes a drain or service opening in the water-jacketed manifold
-   Corrosion-resistant marine specification
-   Engine type: Volvo Penta petrol V8 / 8.1-litre marine engine
-   4 used per assembly

## 🔌 Function

Closes and seals the exhaust-manifold water-jacket service or drain opening.

## ⚠️ Common Signs of Failure

-   Coolant or seawater leakage around the component
-   Restricted flow, corrosion scale or internal blockage
-   Pressure loss, aeration or repeated overheating alarms
-   Visible pitting, cracking or damaged sealing surfaces

## 🛠️ Service Notes

-   Clean the threads and the seating face before fitting, and make sure the opening itself is clear of old sealant, swarf and corrosion
-   Renew the sealing washer or O-ring where one is fitted rather than reusing a flattened one, and only use thread sealant where the workshop manual for your engine calls for it
-   Tighten to the figure given in the workshop manual for your engine — plugs in aluminium and other soft castings strip easily, and a plug pulled up hard to cure a leak usually distorts the seat and makes it worse
-   Where the plug closes an oil, fuel or coolant passage, run the engine up to temperature afterwards and check the joint under pressure before signing the job off
-   Keep removed plugs paired with the holes they came out of during a strip-down — plugs of very similar appearance often differ in thread, reach or sealing type

## 🔄 Supersession & Cross Reference

### OEM / Related Numbers

-   981749 - related Volvo Penta service plug used in other exhaust assemblies; not assumed interchangeable

## 📦 Condition

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

## 🔎 Full Model Compatibility

Typically suits:

-   Volvo Penta 8.1GiC-J, 8.1GiC-JF, 8.1GiCE-JF, 8.1GiCE-J, 8.1GiCE-M, 8.1GiCE-P, 8.1GiC-Q, 8.1GiCE-Q, 8.1IPSCE-JF, 8.1IPSCE-MF, 8.1IPSCE-P, 8.1IPSCE-Q
-   Volvo Penta V8-380-CE-A, V8-380-C-B, V8-380-CE-B, V8-380-C-D, V8-380-CE-D, V8-430-CE-D, V8-350-C-D, V8-350-CE-D, V8-380-C-A

## Details

- **Price:** 54.51 AUD
- **Vendor:** Volvo Penta
- **Type:** Fasteners & Fixings
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 54.51 AUD | In stock |

## Images

- 21203185 Plug | Genuine Volvo Penta Part
- 21203185 Plug | Genuine Volvo Penta Part - photo 2 of 2

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21203185-plug-genuine-volvo-penta)
> Updated: 2026-10-09