# 946779 Cap Plug | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta cap plug weighing 0.005 kg and listed for 115 applications across the D, AQ, TWD, TD, BB and TAD series. No diameter is published against it — cap plug 946778 is the 17.5 mm listing, so if you are working to a measured bore that is the one to check first.

## 🚤 Compatibility

-   **Engine Family:** D, AQ, TWD, TD, BB, TAD
-   **HP Range:** 110-220 HP

Full model list at the end of this description.

## ⚙️ Key Features

-   0.005 kg
-   115 applications across D, AQ, TWD, TD, BB and TAD series engines
-   No published diameter — 946778 is the 17.5 mm listing
-   2 used per assembly

## 🔌 Function

Blanks off an open port or drilling, keeping dirt and water out.

## ⚠️ Common Signs of Failure

-   Plug pushed out or missing
-   Weeping from the blanked port
-   Plug split, hardened or gone brittle
-   Bore corroded so the plug will not hold

## 🛠️ Service Notes

-   Measure the bore before ordering — the two cap plugs here are not separated by their published listings
-   Clean and inspect the bore; corrosion is what pushes plugs out

## 📦 Condition

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

## 🔎 Full Model Compatibility

Typically suits:

-   Volvo Penta D3-110I-B, D3-110I-C, D3-130I-C, D3-220I-G, D3-130A-A, D3-160A-A, D3-130A-B, D3-160A-B, D3-130A-C, D3-160A-C, D3-140A-D, D3-170A-D, D3-200A-D, D3-220A-D, D3-140I-D, D3-140A-E, D3-170A-E, D3-200A-E, D3-220A-E, D3-140I-E, D3-140A-F, D3-170A-F, D3-200A-F, D3-220A-F, D3-140I-F, D3-140A-G, D3-170A-G, D3-200A-G, D3-220A-G, D3-140I-G, D3-190A-B, D3-190A-C, D3-190I-A, D3-110I-A, D3-130I-A, D3-160I-A, D3-110I-D, D3-150I-D, D3-170I-D, D3-200I-D, D3-220I-D, D3-110I-E, D3-150I-E, D3-170I-E, D3-200I-E, D3-220I-E, D3-110I-F, D3-150I-F, D3-170I-F, D3-200I-F, D3-220I-F, D3-110I-G, D3-150I-G, D3-170I-G, D3-200I-G, D3-160I-C, D3-190I-B, D3-190I-C, D3-130I-B, D3-160I-B
-   Volvo Penta 2003, 2003R, 2003R SOLAS, 2003TB, 2003TB SOLAS, 230A, 230B, 250A, 250B, 2001AG, 2001B, 2001BG, 2001D, 2003D, 2003T, 2003TR, 2002AG, 2002B, 2002BG, 2002D, 2003B, 2003B SOLAS, 2003 SOLAS, 2001, 2002, 2001R
-   Volvo Penta D8A5-A MH, D8A6-A MH, D8A5-A MG, D8A6-A MG, D8A4-A MP, D8A1-A MP, D8A2-A MP, D8A3-A MP
-   Volvo Penta AQ131A, AQ131B, AQ131C, AQ131D
-   Volvo Penta AQ151A, AQ151B, AQ151C
-   Volvo Penta AQ125B, AQ125A
-   Volvo Penta AQ145B, AQ145A
-   Volvo Penta TWD740GE, TWD740VE
-   Volvo Penta AQ120B
-   Volvo Penta AQ140A
-   Volvo Penta BB140A
-   Volvo Penta BB145A
-   Volvo Penta D2003AG
-   Volvo Penta TAD740GE
-   Volvo Penta TAD741GE
-   Volvo Penta TD640VE

## Details

- **Price:** 3.78 AUD
- **Vendor:** Volvo Penta
- **Type:** Fasteners & Fixings
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 3.78 AUD | In stock |

## Images

- 946779 Cap Plug | Genuine Volvo Penta Part
- 946779 Cap 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/946779-cap-plug-genuine-volvo-penta)
> Updated: 2026-10-07