# 425075 Idler Gear | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta idler gear from the Engine group, weighing 1.07 kg and listed for 7 applications across the THD and DH engine series.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta THD102KB
-   Volvo Penta THD102KD
-   Volvo Penta THD102K-KB
-   Volvo Penta DH10A
-   Volvo Penta DH10A 285
-   Volvo Penta DH10A 360
-   Volvo Penta DH10A Rail

-   **Engine Family:** THD, DH

## ⚙️ Key Features

-   1.07 kg
-   7 applications on THD and DH series engines
-   Engine group part

## 🔌 Function

Bridges two gears in the train, passing drive between them and keeping their rotation in step.

## ⚠️ Common Signs of Failure

-   Whine, rattle or knock from the timing gears
-   Teeth chipped, pitted or spalled
-   Bearing or bush worn, giving play at the gear
-   Excessive backlash, or timing hard to hold

## 🛠️ Service Notes

-   Check backlash against both mating gears and the bush clearance when fitting
-   Renew the mating gear as well if its tooth flanks are pitted

## 📦 Condition

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

## Details

- **Price:** 885.39 AUD
- **Vendor:** Volvo Penta
- **Type:** Engine Components
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 885.39 AUD | In stock |

## Images

- 425075 Idler Gear | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/425075-idler-gear-genuine-volvo-penta)
> Updated: 2026-10-11