# 1549140 Plug | Genuine Volvo Penta Part

## 🔧 Product Description

This genuine Volvo Penta plug is a machined connection, housing or closure component used in the cylinder-block gallery closure. It is manufactured to the original Volvo Penta dimensions and interface requirements so the adjoining component remains supported, located and sealed at the housing or closure. In service, it closes the designated machined block passage and retains the fluid or pressure within that gallery. Fitment is controlled by the exact engine or product configuration and serialised parts list; confirm OEM number 1549140 against the installed assembly before ordering.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta D12C-A MP
-   Volvo Penta D12D-A MG
-   Volvo Penta D12D-A MH
-   Volvo Penta D12D-A MP
-   Volvo Penta D12D-B MH
-   Volvo Penta D12D-B MP
-   Volvo Penta D12D-C MH
-   Volvo Penta D12D-C MP
-   Volvo Penta D12D-D MP
-   Volvo Penta D12D-E MG
-   Volvo Penta D12D-E MH
-   Volvo Penta D12D-E MP
-   Volvo Penta D12D-F MP
-   Volvo Penta D12D-G MH
-   Volvo Penta D12D-G MP
-   Volvo Penta D12D-H MP

-   **Engine Family:** D

## ⚙️ Key Features

-   OEM Volvo Penta part number 1549140
-   System group: Engine
-   Supersedes and replaces previous part number 1549582
-   Net weight approximately 0.054 kg
-   Fits D12C and D12D series marine diesel engines

## 🔌 Function

The plug closes off a threaded port or drilled passage in the engine so that oil, coolant or pressurised gas cannot escape. It maintains a leak-free seal while allowing the port to be opened for service, draining or diagnostic access when required.

## ⚠️ Common Signs of Failure

-   Weeping or dripping fluid around the plug seat
-   Corroded, rounded or damaged hex or drive recess preventing removal
-   Damaged or stretched threads causing the plug to loosen or fail to torque correctly
-   Loss of oil pressure or coolant level traced to a seeping sealing point
-   Hardened or deformed sealing washer leaving residue and staining around the port

## 🛠️ 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 Supersession Chain

-   1549140 → Supersedes 1549582

### OEM / Related Numbers

-   1549582 earlier number superseded by this part

## 📦 Condition

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

## Details

- **Price:** 89.94 AUD
- **Vendor:** Volvo Penta
- **Type:** Fasteners & Fixings
- **Tags:** Volvo Penta Parts | Genuine Marine Engine & Service Components

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 89.94 AUD | In stock |

## Images

- 1549140 Plug | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/1549140-plug-genuine-volvo-penta)
> Updated: 2026-10-09