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