Inner Pinion Bearing – Fits Volvo Penta SX Sterndrive (Replaces 3850852, 183668, 853949)
Inner Pinion Bearing – Fits Volvo Penta SX Sterndrive (Replaces 3850852, 183668, 853949) is backordered and will ship as soon as it is back in stock.
Couldn't load pickup availability
Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Inner Pinion Bearing – Fits Volvo Penta SX Sterndrive (Replaces 385...
Product Details
This high-quality Inner Pinion Bearing – Fits Volvo Penta SX Sterndrive is a tapered roller bearing designed for the inner pinion position in various Volvo Penta SX sterndrives. It is engineered to handle radial and axial loads, ensuring smooth and reliable operation of your sterndrive's gear assembly.
This part is a direct replacement for Volvo Penta 3850852 and 853949, Sierra 18-3668, FAG BRG-852, and SEI Marine Products 93-115-06B.
- Engineered for the demanding marine environment.
- Constructed with a durable sheet steel cage.
- Single-row bearing designed to meet ABEC 1 tolerance standards.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket suppliers.
| Brand | Part Number |
|---|---|
| Volvo Penta | 3850852 |
| Volvo Penta | 853949 |
| Sierra Marine | 18-3668 |
| FAG | BRG-852 |
| SEI Marine Products | 93-115-06B |
Engine & Model Compatibility
Confirm your engine model in the table below. This bearing fits a wide range of Volvo Penta sterndrives.
| Brand | Model | OEM Part No. | Notes |
|---|---|---|---|
| Volvo Penta | DP-C1 | 3850852 | Variants: 1.95, 2.30 |
| Volvo Penta | DP-D1 | 3850852 | Variants: 1.68, 1.78, 1.95, 2.30 |
| Volvo Penta | DP-E | 3850852 | |
| Volvo Penta | DP-G | 3850852 | |
| Volvo Penta | DP-SM | 3850852 | Variants: 1.68, 1.78, 1.95, 2.32 |
| Volvo Penta | DP-S | 3850852 | |
| Volvo Penta | DPS-A | 3850852 | Variants: OXi, OXi 1.78, OXi 1.95, OXi 2.14 |
| Volvo Penta | DPS-B | 3850852 | Variants: OX, OX 1.78, OX 1.95, OX 2.14 |
| Volvo Penta | DPS-B1 | 3850852 | Variants: 1.95, 2.14, 2.32, OX, OX 1.95, OX 2.14, OX 2.32 |
| Volvo Penta | DP-SMTD | 3850852 | Variants: 1.95 |
| Volvo Penta | DP-SMTD1 | 3850852 | Variants: 1.95 |
| Volvo Penta | DP-SMTD3 | 3850852 | Variants: 2.11 |
| Volvo Penta | DPX-A | 3850852 | |
| Volvo Penta | DPX-R | 3850852 | Variants: 1.47, 1.51, 1.59, 1.68, 1.78 |
| Volvo Penta | DPX-S | 3850852 | Variants: 1.59, 1.68, 1.78 |
| Volvo Penta | DPX-S1 | 3850852 | Variants: 1.59, 1.68, 1.78 |
| Volvo Penta | FWD-B | 3850852 | Variants: 1.95 |
| Volvo Penta | FWD-B1 | 3850852 | Variants: 2.14, 2.32 |
| Volvo Penta | FWD-B2 | 3850852 | Variants: 2.14, 2.32 |
| Volvo Penta | SP-E | 3850852 | |
| Volvo Penta | SX-A | 3850852 | Variants: 1.43, 1.51, 1.60, 1.66, 1.79, 1.89, 1.97, 2.18 |
| Volvo Penta | SX-C | 3850852 | |
| Volvo Penta | SX-CT | 3850852 | |
| Volvo Penta | SX-M | 3850852 | Variants: 1.43, 1.51, 1.60, 1.66, 1.79, 1.89, 1.97, 2.18 |
| Volvo Penta | SX-M1 | 3850852 | Variants: 1.43, 1.51, 1.60, 1.66, 1.79, 1.89, 1.97, 2.18 |
| Volvo Penta | SX-MTD | 3850852 | Variants: 1.66, 1.79, 2.18 |
| Volvo Penta | SX-MTD3 | 3850852 | Variants: 1.66 |
| Volvo Penta | SX-R | 3850852 | |
| Volvo Penta | SX-S | 3850852 | |
| Volvo Penta | SX-ST | 3850852 | |
| Volvo Penta | XDP-B | 3850852 |
Technical Specs
- Product Type
- Tapered roller bearing
- Installation
- Inner Pinion Bearing
- Housing Material
- Sheet steel cage
- Dimensions
- Inner diameter: 35.000 mm (1.378 in) | Outer diameter: 80.000 mm (3.150 in) | Width: 22.750 mm (0.896 in)
- Weight
- 0.539 kg (1.188 lbs)
- Operating Temperature
- -30 to +120 °C (-22 to +248 °F)
- Other Technical Attributes
- Tolerance class: P0/PN2 / ABEC 1; Roller rows: Single row bearing; Standard version
What’s in the Box
- 1 x Bearing (3850852/183668/853949)
Installation Notes
- Ensure the engine is off and the battery is disconnected.
- Drain the sterndrive gear oil completely.
- Carefully disassemble the sterndrive unit to access the inner pinion gear and bearing assembly, following the manufacturer's service manual.
- Remove the old bearing from the pinion gear using a suitable bearing puller.
- Thoroughly clean the pinion gear and the bearing housing, inspecting for any signs of wear or damage.
- Press the new bearing onto the pinion shaft using a bearing press and appropriate collars. Do not hammer the bearing into place.
- Reassemble the sterndrive, ensuring all components are correctly seated and torqued to the manufacturer's specifications.
- Refill the sterndrive with new, recommended gear oil before operation.
Troubleshooting & FAQ
How do I know if my pinion bearing is failing?
Common signs of a failing pinion bearing include a metallic whining or grinding noise from the sterndrive that changes with engine speed, excessive vibration, or the presence of金属 shavings in the gear oil during a change.
Is this bearing pre-greased?
No, this bearing is typically shipped with a light corrosion-inhibiting oil. It must be lubricated with the appropriate sterndrive gear oil upon installation. The gear case provides the necessary lubrication during operation.
Do I need special tools to install this bearing?
Yes, professional installation is highly recommended. Specialized tools such as a bearing press, bearing pullers, and specific service tools for your Volvo Penta sterndrive model are required to ensure correct and damage-free installation.
What's the difference between this inner bearing and the outer pinion bearing?
The sterndrive has two pinion bearings. The inner bearing (this part) is located closer to the gears, while the outer bearing is located closer to the driveshaft universal joint. They are different sizes and not interchangeable. Always replace the correct bearing for its position.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). It's built to OEM-level specifications with comparable materials and manufactured in an ISO 9002 facility, with batch-inspections for consistency.
Shipping speed & cost?
We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns?
This product is covered by a 1-year warranty against manufacturing defects under normal use. If any issues arise, contact our support team with your order details. Returns are accepted within our standard window for unused items in their original condition. See our policy page or reach out for instructions.
Safety & Important Info
- Verify images and specifications against your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or quality control.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
