# 21779581 Circulation Pump | Genuine Volvo Penta Part

## 🔧 Product Description

Freshwater circulation pump for the D2-50F closed cooling circuit. The pump circulates coolant through the cylinder block, cylinder head and heat exchanger to maintain stable operating temperature.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta D2-55
-   Volvo Penta D2-55B
-   Volvo Penta D2-55C
-   Volvo Penta D2-55D
-   Volvo Penta D2-55E
-   Volvo Penta D2-55F
-   Volvo Penta D2-50F
-   Volvo Penta D2-75
-   Volvo Penta D2-75B
-   Volvo Penta D2-75C
-   Volvo Penta D2-75F
-   Volvo Penta D2-60F

-   **Engine Family:** D
-   **HP Range:** 50-75 HP

## ⚙️ Key Features

-   Engine-specific pump capacity
-   Factory pulley and mounting geometry
-   Sealed bearing and shaft arrangement
-   Designed for the original gasket and coolant path
-   Correct belt tension and coolant are required

## 🔌 Function

Circulates freshwater coolant through the engine and heat exchanger.

## ⚠️ Common Signs of Failure

-   Coolant leakage from the weep hole or seal
-   Bearing rumble or shaft play
-   Reduced heater or coolant circulation
-   Pulley wobble or belt-tracking problems

## 🛠️ Service Notes

-   Confirm the exact D2 pump variant against the engine's serial before ordering — this circulation-pump range spans units from just over 1 kg up to nearly 5 kg, and a generic "circulation pump" description does not distinguish them
-   Check the drive belt tension and thermostat before condemning the pump, and flush the system and fit fresh coolant when it is renewed

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   21779581 → Supersedes / replaces exchange circulation pump 3801345

### OEM / Related Numbers

-   21194527 - pump gasket
-   21194494 - pulley references
-   22212494 - pulley references
-   3580575 - plate
-   3580576 - gasket

## 📦 Condition

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

## Details

- **Price:** 1477.98 AUD
- **Vendor:** Volvo Penta
- **Type:** Pumps
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 1477.98 AUD | In stock |

## Images

- 21779581 Circulation Pump | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21779581-circulation-pump-genuine-volvo-penta)
> Updated: 2026-09-06