3857152 Lower Gear | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta lower gear covering the 2.32:1 and 1.95:1 ratios, from the Marine Propulsion group, weighing 34.927 kg and listed for one DP application. It supersedes 3803414, catalogued earlier as a gear under, and 872768, which was listed as a reman lower gear.

🚤 Compatibility

Typically suits:

• Volvo Penta DP-E

• Engine Family: DP

⚙️ Key Features

• Covers the 2.32:1 and 1.95:1 ratios
• 34.927 kg
• Supersedes 3803414 and 872768
• One DP application
• Also supersedes Volvo part number 872305

🔌 Function

Carries the drive from the vertical shaft round to the propeller shafts at the reduction printed on the drive, forming the lower half of the gear train.

⚠️ Common Signs of Failure

• Whine or howl from the lower unit that rises with load
• Bright flake or paste in the drained gear oil
• Clunk or heavy backlash on taking up drive
• Teeth pitted, chipped or spalled on strip-down
• Bearing races blued or scored from oil starvation

🛠️ Service Notes

• This one number serves two ratios, so confirm the drive's own ratio marking rather than assuming one gear per ratio
• 3857099 is the 1.78:1 gear and 3857155 the 1.68:1, and the three are within 4 kg of each other, so weight is no guide
• Renew shims, seals and bearings with it and reset the tooth contact pattern

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 3857152 → Supersedes 3803414 → Supersedes 3803187

OEM / Related Numbers

• 872768 earlier number superseded by this part
• 3803414 earlier number superseded by this part
• 3803187 earlier number superseded by this part

📦 Condition

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