3852405 Drive Gear Set | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta drive gear set for the 2.18:1 ratio, weighing 2.08 kg and listed for 14 applications on the SX drive series. It is the only single-ratio set of the four and the deepest reduction. It supersedes part number 3850940, catalogued earlier as a gear set.

🚤 Compatibility

Typically suits:

• Volvo Penta SX-RT2
• Volvo Penta SX-S
• Volvo Penta SX-ST
• Volvo Penta SX-C
• Volvo Penta SX-C1
• Volvo Penta SX-C2
• Volvo Penta SX-CT
• Volvo Penta SX-CT1
• Volvo Penta SX-CT2
• Volvo Penta SX-M
• Volvo Penta SX-M1
• Volvo Penta SX-MTD
• Volvo Penta SX-MTD3
• Volvo Penta SX-RT1

• Engine Family: SX

⚙️ Key Features

• For the 2.18:1 ratio only - the deepest reduction of the four sets
• 2.08 kg
• Supersedes 3850940
• 14 applications on the SX series

🔌 Function

Provides the meshed gear pair that turns the drive through its designed reduction ratio.

⚠️ Common Signs of Failure

• Load-dependent whine or howl from the drive
• Metal debris on the drain magnet
• Pitted, scuffed or chipped teeth
• Backlash outside specification

🛠️ Service Notes

• The other sets each cover two ratios - 3852402, 3852403 and 3852404 - while this one is listed for 2.18:1 alone, so check the ratio before ordering
• Renew bearings and reset the shim stack and backlash when the set is changed

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 3852405 → Supersedes 3850940

OEM / Related Numbers

• 3850940 earlier number superseded by this part

📦 Condition

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