# 21487639 Engine Bracket | Genuine Volvo Penta Part

## 🔧 Product Description

A heavy-duty front or port-side engine mounting bracket used on Volvo Penta D4 and D6 marine propulsion engines.

## 🚤 Compatibility

-   **Engine Family:** D
-   **HP Range:** 145-480 HP

Full model list at the end of this description.

## ⚙️ Key Features

-   Structural engine-mounting bracket
-   Maintains engine and driveline alignment
-   Replaces earlier bracket 3583516
-   Designed for propulsion torque and vibration
-   Used with dedicated cushion, nut and locking hardware

## 🔌 Function

The bracket transfers engine weight and torque reaction into the flexible mounting while maintaining propulsion alignment.

## ⚠️ Common Signs of Failure

-   Fretting at mounting holes
-   Engine movement
-   Driveline misalignment
-   Repeated mount or fastener failure

## 🛠️ Service Notes

-   Start all the fasteners by hand and get the bracket sitting flat on clean mating faces before tightening anything, so nothing is pulled into strain
-   Renew self-locking nuts, lock washers and thread-locking compound where the original assembly used them, and tighten to the figure given in the workshop manual for your engine
-   Inspect the bracket for cracks around the holes and weld lines before fitting, and do not attempt to straighten or weld a distorted engine bracket back into service
-   Where the bracket forms part of the engine mounting, recheck engine alignment and shaft or drive coupling alignment after the work, following the procedure for your installation
-   Renew any flexible mount, bush or shim pack that is disturbed and found perished, corroded or crushed

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   21487639 → Supersedes 3583516 → Supersedes 21152125

### OEM / Related Numbers

-   3583516 earlier number superseded by this part
-   21152125 earlier number superseded by this part
-   23136596 - Related opposite-side bracket
-   21203504 - Related rubber cushions
-   3595043 - Related rubber cushions
-   847766 - Lock washer
-   990973 - Mounting nuts
-   955786 - Mounting nuts

## 📦 Condition

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

## 🔎 Full Model Compatibility

Typically suits:

-   Volvo Penta D6-340I-G, D6-380I-G, D6-440I-G, D6-480I-G, D6-300A-G, D6-340A-G, D6-380A-G, D6-440I-WJ-G, D6-480I-WJ-G, D6-300D-G, D6-340D-G, D6-380D-G, D6-440D-G, D6-480D-G, D6-400A-G, D6-440A-G, D6-300I-G
-   Volvo Penta D4-175I-G, D4-230I-G, D4-270I-G, D4-320I-G, D4-300I-G, D4-150A-G, D4-230A-G, D4-270A-G, D4-320A-G, D4-300A-G, D4-145I-G

## Details

- **Price:** 962.08 AUD
- **Vendor:** Volvo Penta
- **Type:** Brackets & Mounts
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 962.08 AUD | In stock |

## Images

- 21487639 Engine Bracket | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21487639-engine-bracket-genuine-volvo-penta)
> Updated: 2026-09-19