# 21881185 Rocker Arm | Genuine Volvo Penta Part

🔧 Product Description

  

Genuine Volvo Penta D8 / TAD8 Fuel-Injector Rocker Arm - Part Number: 21881185

  

A genuine injector rocker arm used to transfer camshaft motion to the unit-injector mechanism on selected Volvo Penta D8 and TAD8 engines.

  

⚙️ Key Features

  

• Precision valve-train geometry

• Hardened contact and pivot surfaces

• Designed for high-cycle engine operation

• Maintains specified valve or injector motion

• Position- and engine-calibration-specific component

  

🔄 Supersession & Cross Reference

  

OEM Supersession Chain:

  

• 21881185 → supersedes 21266310

  

OEM / Related Numbers:

  

• 21266310 - earlier injector-rocker reference

  

Aftermarket / Verified Equivalents:

  

• No aftermarket equivalent

  

🚤 Compatibility

  

Commonly used on:

  

• Volvo Penta D8 marine and TAD8 industrial common-rail diesel systems

  

Typically suits:

  

• Engine / drive models:

• D8A1-A MP, D8A2-A MP

• TAD840VE, TAD841VE, TAD842VE, TAD843VE

• TAD850VE, TAD851VE, TAD852VE, TAD853VE

• TAD870VE, TAD871VE, TAD872VE, TAD873VE

• TAD880GE, TAD881GE, TAD882GE

  

• HP Range: Approximately 250HP - 650HP, depending on rating

• Engine Type: 7.7L inline six-cylinder common-rail turbocharged diesel

• Year Range: Approximately 2010 - 2021

• Serial / Fitment Note: Confirm the complete engine, drive or equipment product number and serial number before ordering.

  

🔌 Function

  

Transfers or controls valve-train motion so the intake valve, exhaust valve or injector operates at the specified timing and lift.

  

Common signs of failure:

  

• Top-end ticking or knocking

• Excessive valve or injector clearance

• Cylinder misfire, low compression or reduced power

• Pitting, scoring, cracking or loss of lubrication

• Severe valve, injector or camshaft damage after failure

  

📦 Condition

  

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging

## Details

- **Price:** 1359.47 AUD
- **Vendor:** Volvo Penta
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 1359.47 AUD | In stock |

## Images

- 21881185 Rocker Arm | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/21881185-rocker-arm-genuine-volvo-penta)
> Updated: 2026-08-03