# 22778739 Unit Injector | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta unit injector from the Fuel System group, weighing 1.16 kg and listed for eight D series engine applications. Injector 22778756 is a closely related part at 1.182 kg covering three engines, so order by part number.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta D16C1-E MG
-   Volvo Penta D16C1-F MG
-   Volvo Penta D16C2-E MG
-   Volvo Penta D16C2-F MG
-   Volvo Penta D16C1-E MH
-   Volvo Penta D16C1-F MH
-   Volvo Penta D16C2-E MH
-   Volvo Penta D16C2-F MH

-   **Engine Family:** D

## ⚙️ Key Features

-   Unit injector from the Fuel System group
-   1.160 kg
-   Listed for eight D series applications
-   Injector 22778756 is a closely related part at 1.182 kg covering three engines

## 🔌 Function

Combines the pumping element and the nozzle in one body, generating injection pressure at the cylinder and metering the fuel charge into the combustion chamber on the control unit's command.

## ⚠️ Common Signs of Failure

-   Rough or lumpy idle with a distinct misfire on one cylinder
-   Black or white smoke from the exhaust
-   Knocking or hammering from the affected cylinder
-   Hard starting and poor running until the engine is warm
-   On removal, a sooted, wet or eroded nozzle tip, or carbon build-up around the seat

## 🛠️ Service Notes

-   Only 22 grams separate this from injector 22778756, so order by part number rather than by weight or appearance
-   Renew the injector seals and copper washer and clean the bore in the head before fitting
-   Programme or code the new injector to the control unit where the engine requires it, and check fuel filtration - dirty fuel is what kills unit injectors

## 🔄 Supersession & Cross Reference

### Other-Brand OEM Numbers

-   Delphi: 42015555

## 📦 Condition

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

## Details

- **Price:** 2541.15 AUD
- **Vendor:** Volvo Penta
- **Type:** Injectors & Injection
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 2541.15 AUD | In stock |

## Images

- 22778739 Unit Injector | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/22778739-unit-injector-genuine-volvo-penta)
> Updated: 2026-10-09