# 21274781 Gear | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta precision timing gear used in the gear train on D2-55F and D2-75F marine engines. The gear maintains the correct phase relationship between the crankshaft, camshaft and fuel-injection drive.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta D2-55
-   Volvo Penta D2-55B
-   Volvo Penta D2-55C
-   Volvo Penta D2-55D
-   Volvo Penta D2-55E
-   Volvo Penta D2-55F
-   Volvo Penta D2-50F
-   Volvo Penta D2-75
-   Volvo Penta D2-75B
-   Volvo Penta D2-75C
-   Volvo Penta D2-75F
-   Volvo Penta D2-60F

-   **Engine Family:** D
-   **HP Range:** 50-75 HP

## ⚙️ Key Features

-   Genuine Volvo Penta hardened timing gear
-   Confirmed D2-55F and D2-75F fitment
-   Precision tooth form and timing-mark location
-   Maintains valve and injection timing
-   Inspect mating gears and backlash during replacement
-   Engine type: Volvo Penta D2 four-cylinder marine diesel

## 🔌 Function

Transfers crankshaft rotation through the timing train at the exact ratio required for camshaft and injection operation.

## ⚠️ Common Signs of Failure

-   Whine, rattle or knock from the timing-gear end of the engine
-   Rough running, hard starting or a loss of power as timing drifts
-   Timing marks no longer aligning once the covers are off
-   Chipped, pitted or scuffed teeth and excessive backlash found on inspection
-   Metal particles in the oil or on the sump magnet

## 🛠️ Service Notes

-   Supersedes 21188964
-   Inspect the mating gears, bearings and backlash before fitting, as a worn partner gear will quickly destroy a new one
-   Set and recheck the timing marks carefully on reassembly

## 🔄 Supersession & Cross Reference

### OEM Supersession Chain

-   21274781 → Supersedes 21188964

### OEM / Related Numbers

-   21188964 earlier number superseded by this part
-   3580532 - timing-gear reference used on earlier D2 configurations; not assumed interchangeable

## 📦 Condition

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

## Details

- **Price:** 1037.03 AUD
- **Vendor:** Volvo Penta
- **Type:** Engine Components
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 1037.03 AUD | In stock |

## Images

- 21274781 Gear | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21274781-gear-genuine-volvo-penta)
> Updated: 2026-10-08