3852403 Drive Gear Set | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta drive gear set for the 1.60:1 and 1.89:1 ratios, weighing 2.05 kg and listed for 14 applications on the SX drive series. It supersedes part number 3850938, 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 1.60:1 and 1.89:1 ratios
• 2.05 kg
• Supersedes 3850938
• 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

• Rising whine from the drive under load
• Metal on the drain magnet or in the drained oil
• Pitted, scuffed or chipped tooth flanks
• Backlash measured well outside specification

🛠️ Service Notes

• Ratio decides the order - 1.51:1 and 1.79:1 as 3852402, 1.60:1 and 1.89:1 here, 1.66:1 and 1.97:1 as 3852404 and 2.18:1 as 3852405
• Three of the four sets are published within 30 g of each other, so weight is no help - go by the ratio stamped on the drive
• Renew bearings and reset the shim stack and backlash when fitting

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 3852403 → Supersedes 3850938

OEM / Related Numbers

• 3850938 earlier number superseded by this part

📦 Condition

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