# 3860242 Gear Housing | Genuine Volvo Penta Part

## 🔧 Product Description

Genuine Volvo Penta gear housing for the 1.78:1 ratio, from the Marine Propulsion group, weighing 83.5 kg and listed for one DPX application. The 1.59:1 housing 3860240 is published at 80 kg — only 3.5 kg apart — so the ratio marking, not the weight, is what distinguishes them.

## 🚤 Compatibility

Typically suits:

-   Volvo Penta DPX-A

-   **Engine Family:** DPX

## ⚙️ Key Features

-   For the 1.78:1 ratio
-   83.5 kg
-   One published DPX application
-   1.59:1 alternative is gear housing 3860240

## 🔌 Function

Carries the drive's gear set, bearings and shafts in one casting, setting the 1.78:1 reduction between the input shaft and the propeller shaft.

## ⚠️ Common Signs of Failure

-   Whine or growl that changes with load or gear selected
-   Water in the drive oil, or oil weeping from the housing joints
-   Corrosion blistering and paint lifting on the casting
-   Play felt at the propeller shaft, or a knock on gear engagement
-   Metal glitter or bright flakes on the drain plug magnet

## 🛠️ Service Notes

-   The ratio must match the other half of the drive and the propeller selection — confirm 1.78:1 against your build before ordering
-   At 83.5 kg this is a freight item needing lifting gear, not a hand carry
-   Renew the seals, gaskets and the graded shims when the housing is changed and set the backlash to specification

## 📦 Condition

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

## Details

- **Price:** 17063.01 AUD
- **Vendor:** Volvo Penta
- **Type:** Transmission & Gearbox
- **Tags:** Volvo Penta

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 17063.01 AUD | In stock |

## Images

- 3860242 Gear Housing | Genuine Volvo Penta Part

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> Source: [Sawley's Auto and Marine](https://www.sawleysautoandmarine.com.au/products/3860242-gear-housing-genuine-volvo-penta)
> Updated: 2026-09-06