# 20998750 Adapter | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine service component used in the tad420ve 12 v engine-heater electrical and coolant installation. It restores the original Volvo Penta fit, dimensions and operating relationship.

## 🚤 Compatibility

-   **Engine Family:** TD, TAD
-   **HP Range:** Approximately 140 HP
-   **Year Range:** Approximately late 1990s-2000s

Full model list at the end of this description.

## ⚙️ Key Features

-   Adapter, 0.095 kg
-   Listed for 25 applications across TD and TAD engines
-   For the TAD420VE engine-heater electrical and coolant installation

## 🔌 Function

Adapts one connection size or form to another so the heater installation can be joined to the engine's existing port.

## ⚠️ Common Signs of Failure

-   Coolant weeping at either of the adapter's joints
-   Adapter found loose in its housing
-   Thread or sealing face damaged from overtightening
-   Seal or washer crushed and hardened

## 🛠️ Service Notes

-   Fit new seals at both ends, and check the port thread in the housing before condemning the adapter

## 🔄 Supersession & Cross Reference

### OEM / Related Numbers

-   20998739 12 V relay
-   20998736 cable set
-   20796993 and 20796994 cable sets
-   947628 gasket
-   969011 gasket
-   20573949 and 22288340 engine-heater references
-   20405599 O-ring

## 📦 Condition

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

## 🔎 Full Model Compatibility

Typically suits:

-   Volvo Penta TAD520GE, TAD520VE
-   Volvo Penta TAD530GE MECH, TAD530GE EDC4
-   Volvo Penta TAD531GE MECH, TAD531GE EDC4
-   Volvo Penta TAD720GE, TAD720VE
-   Volvo Penta TAD721GE, TAD721VE
-   Volvo Penta TAD722GE, TAD722VE
-   Volvo Penta TAD730GE MECH, TAD730GE EDC4
-   Volvo Penta TAD731GE MECH, TAD731GE EDC4
-   Volvo Penta TAD420VE
-   Volvo Penta TAD532GE EDC4
-   Volvo Penta TAD620VE
-   Volvo Penta TAD732GE EDC4
-   Volvo Penta TAD733GE EDC4
-   Volvo Penta TAD734GE
-   Volvo Penta TD420VE
-   Volvo Penta TD520GE
-   Volvo Penta TD720GE

## Details

- **Price:** 61.77 AUD
- **Vendor:** Volvo Penta
- **Type:** Hoses & Pipes
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 61.77 AUD | In stock |

## Images

- 20998750 Adapter | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/20998750-adapter-genuine-volvo-penta)
> Updated: 2026-09-19