# 3581603 Oil Cooler | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta oil cooler weighing 2.148 kg and listed for nine applications across D, HS, MS and ZF series engines and drives. It is a seawater-cooled heat exchanger for reversing gear and transmission oil. It supersedes part number 3581523.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta D2-55F
-   Volvo Penta D2-50F
-   Volvo Penta D2-75F
-   Volvo Penta D2-60F
-   Volvo Penta HS25A
-   Volvo Penta MS25L
-   Volvo Penta MS25A-A
-   Volvo Penta ZF25
-   Volvo Penta MS25A

-   **Engine Family:** D, HS, MS, ZF
-   **HP Range:** 50-75 HP

## ⚙️ Key Features

-   2.148 kg
-   Seawater-cooled reversing gear and transmission oil cooler
-   Supersedes 3581523
-   Nine applications across D, HS, MS and ZF series

## 🔌 Function

Transfers heat from the oil into the coolant or seawater circuit.

## ⚠️ Common Signs of Failure

-   Oil in the coolant or coolant in the oil
-   High oil temperature under load
-   External weeping at the end seals
-   Internal fouling reducing heat transfer
-   Corrosion of the tube stack

## 🛠️ Service Notes

-   Renew the sealing rings on refitting
-   Flush both circuits thoroughly if the cooler has failed internally

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   3581603 → Supersedes 3581523

### OEM / Related Numbers

-   3581523 earlier number superseded by this part

## 📦 Condition

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

## Details

- **Price:** 858.03 AUD
- **Vendor:** Volvo Penta
- **Type:** Oil & Lubrication
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 858.03 AUD | In stock |

## Images

- 3581603 Oil Cooler | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/3581603-oil-cooler-genuine-volvo-penta)
> Updated: 2026-09-06