# 3987785 Washer | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta washer from the Alternator, Charging, Electric Motor, Electric Drives group, weighing 29 grams and listed for 4 applications across the TWD and TAD series. Washer 3979500 sits in the same group with a published weight of 0.120 kg, a figure out of proportion for a washer, so use part numbers rather than weights across this pair.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta TWD1240VE
-   Volvo Penta TAD1241VE
-   Volvo Penta TAD1242VE
-   Volvo Penta TAD1241-42VE

-   **Engine Family:** TWD, TAD

## ⚙️ Key Features

-   29 g
-   4 applications across the TWD and TAD series
-   Alternator, Charging, Electric Motor, Electric Drives group
-   Sibling washer in this group is 3979500

## 🔌 Function

Spreads the load of a fastener over the surface beneath it and stops the joint from digging in or working loose.

## ⚠️ Common Signs of Failure

-   Fastener found slack after a period of running
-   Washer dished, cracked or worn bright on one face
-   Bearing surface beneath it indented or pulled
-   Corrosion between the washer and the mounting face

## 🛠️ Service Notes

-   Order by part number — weights are an unreliable guide across graded washers
-   Renew rather than reuse where the washer forms part of a clamping or earth path

## 📦 Condition

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

## Details

- **Price:** 15.37 AUD
- **Vendor:** Volvo Penta
- **Type:** Fasteners & Fixings
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 15.37 AUD | In stock |

## Images

- 3987785 Washer | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/3987785-washer-genuine-volvo-penta)
> Updated: 2026-09-06