# 877721 Sealing Kit | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta sealing kit from the Marine Propulsion group, weighing 0.156 kg and listed for 21 applications across the D series engines and HS series transmissions. A second sealing kit for the same group, 877723 at 0.249 kg, covers 20 applications, and neither carries a variant note - so order the number your transmission's parts list calls for.

## 🚤 Compatibility

-   **Engine Family:** D, HS
-   **HP Range:** 300-435 HP

Full model list at the end of this description.

## ⚙️ Key Features

-   0.156 kg
-   Listed for 21 applications across D engines and HS transmissions
-   Sealing kit 877723 is the other set listed here, at 0.249 kg for 20 applications

## 🔌 Function

Renews the seals of the transmission in one set, so every joint disturbed during the strip is closed with a new seal.

## ⚠️ Common Signs of Failure

-   Oil weeping from the transmission casing joints or the output shaft
-   Gearbox oil level dropping between checks
-   Oil turned milky where water has found its way in
-   Drips appearing under the gearbox after running

## 🛠️ Service Notes

-   Confirm the transmission model against the parts list - 877723 is the other HS sealing kit listed here
-   Check the shaft sealing surfaces for scoring before fitting new seals

## 📦 Condition

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

## 🔎 Full Model Compatibility

Typically suits:

-   Volvo Penta D6-310I-D, D6-310I-E, D6-300I-F, D6-330I-C, D6-370I-C, D6-330I-D, D6-310I-C, D6-330I-F, D6-370I-F, D6-435I-C, D6-435I-D, D6-435I-E, D6-435I-F, D6-370I-D, D6-330I-E, D6-370I-E
-   Volvo Penta D4-300I-C, D4-300I-D, D4-300I-E, D4-300I-F
-   Volvo Penta HS80AE

## Details

- **Price:** 626.57 AUD
- **Vendor:** Volvo Penta
- **Type:** Service & Repair Kits
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 626.57 AUD | In stock |

## Images

- 877721 Sealing Kit | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/877721-sealing-kit-genuine-volvo-penta)
> Updated: 2026-09-01