# 20918793 Washer | Genuine Volvo Penta Part

## 🔧 Product Description

OEM fastening or load-distribution component used in the tad650ve low-pressure fuel supply and transfer-pump assembly. It restores the specified thread, strength, length and clamping geometry required by the original assembly.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta TAD650VE
-   Volvo Penta TAD660VE

-   **Engine Family:** TAD
-   **HP Range:** Approximately 250 HP
-   **Year Range:** Approximately 2000s-2010s

## ⚙️ Key Features

-   Washer for the low-pressure fuel supply and transfer-pump assembly
-   0.003 kg
-   2 applications across TAD-series engines

## 🔌 Function

Spreads the fastener load at the transfer-pump or fuel-supply mounting so the clamp load holds without the fastener digging in.

## ⚠️ Common Signs of Failure

-   Fastener found loose with the joint working
-   Diesel weeping at the joint the fastener clamps
-   Washer found flattened, dished or cracked
-   Fretting or a bright witness ring under the washer
-   Mounting face bruised where the washer has bedded in

## 🛠️ Service Notes

-   Check you are fitting the same type of washer that came out — plain, hardened, sealing and locking washers are not interchangeable, and the wrong one either fails to seal or fails to hold
-   Treat sealing washers on fuel, oil and coolant unions as single-use; they seal by deforming onto the faces, so a used one will not seal reliably a second time
-   Clean the seating faces and make sure the washer sits flat and square, fully under the head or nut, before tightening — a washer trapped on a chamfer or edge will crush unevenly
-   Tighten the fastener to the figure given in the workshop manual for your engine, and account for every washer on reassembly so none is left loose inside a housing or the engine bay

## 🔄 Supersession & Cross Reference

### OEM / Related Numbers

-   20937637 fuel pipe
-   25167 hollow screw
-   21108673 sealing ring
-   20460045 clamp
-   20459227 retaining screw
-   21099858 fuel hose
-   20450728 screw
-   20937634 spacer
-   20918988 nipple
-   20567447 plate
-   21019945 fuel pump
-   993471 retaining screws

## 📦 Condition

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

## Details

- **Price:** 6.48 AUD
- **Vendor:** Volvo Penta
- **Type:** Fasteners & Fixings
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 6.48 AUD | In stock |

## Images

- 20918793 Washer | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/20918793-washer-genuine-volvo-penta)
> Updated: 2026-09-06