# 978774 V-Belt Set | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta v-belt set, 1313 mm long, weighing 0.308 kg and listed for four applications across TAD engines. It supersedes 966397, which was catalogued earlier as a single v-belt — so the current part is a set where the old number was one belt, and the 1313 mm length is what identifies it.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta TAD720VE
-   Volvo Penta TAD721VE
-   Volvo Penta TAD722VE
-   Volvo Penta TAD520VE

-   **Engine Family:** TAD

## ⚙️ Key Features

-   1313 mm long
-   Supplied as a set, not as a single belt
-   Fits four applications across TAD engines
-   0.308 kg
-   Supersedes 966397, catalogued earlier as a single v-belt
-   L=1313mm (Volvo assembly listing)

## 🔌 Function

Drives an accessory off the crankshaft, supplied as a set so the belts running together are all renewed at the same time.

## ⚠️ Common Signs of Failure

-   Squealing from the front of the engine on start-up or under load
-   One belt visibly slacker or running deeper in its groove than its neighbour
-   Cracks across the back of a belt, or glazed and shiny flanks
-   Black belt dust building up under the pulleys
-   Charge warning light flickering, or the alternator falling behind

## 🛠️ Service Notes

-   The number it replaces was listed as a single belt and this one is a set — check what your installation actually runs before ordering, so you neither come up short nor buy twice
-   Do not fit one new belt alongside an old one from the set

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   978774 → Supersedes 966397

### OEM / Related Numbers

-   966397 earlier number superseded by this part

## 📦 Condition

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

## Details

- **Price:** 132.64 AUD
- **Vendor:** Volvo Penta
- **Type:** Belts, Pulleys & Tensioners
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 132.64 AUD | In stock |

## Images

- 978774 V-Belt Set | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/978774-v-belt-set-genuine-volvo-penta)
> Updated: 2026-10-12