Trim/Tilt Cylinder Seal Kit – Fits OMC Cobra & Volvo Penta SX, DP-S, DP-SM (Replaces 0985060, 3854247)
Trim/Tilt Cylinder Seal Kit – Fits OMC Cobra & Volvo Penta SX, DP-S, DP-SM (Replaces 0985060, 3854247) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
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Trim/Tilt Cylinder Seal Kit – Fits OMC Cobra & Volvo Penta SX, ...
Trim/Tilt Cylinder Seal Kit – Fits OMC Cobra & Volvo Penta SX, DP-S, DP-SM (Replaces 0985060, 3854247) is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket Trim/Tilt Cylinder Seal Kit is designed to rebuild hydraulic cylinders on a wide range of OMC Cobra and Volvo Penta stern drives. It fits most OMC Cobra models from 1986–1998 (2.3L to 8.2L engines), including King Cobra, as well as Volvo Penta SX, DP-S, and DP-SM series drives with compatible trim/tilt cylinders.
This kit is a direct replacement for OMC part numbers 0985060, 0778202, and 3854247, and Volvo Penta part number 3854247.
- Made with marine-grade materials for superior saltwater resistance.
- Services a single trim/tilt cylinder (order two kits for both cylinders).
- Restores hydraulic integrity to prevent fluid leaks and restore performance.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| OMC | 0985060 |
| OMC | 0778202 |
| OMC | 3854247 |
| Volvo Penta | 3854247 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For OMC Cobra stern drives, this kit fits models from 1986 to 1998.
| Brand | Model | Years | OEM Part No. |
|---|---|---|---|
| OMC | 2.3L (232) | 1987–1990 | 0985060 |
| OMC | 2.5L (252) | 1986 | 0985060 |
| OMC | 3.0L (302) | 1986–1998 | 0985060 |
| OMC | 3.2L (32D) | 1992–1993 | 0985060 |
| OMC | 4.3L (432/434) | 1986–1998 | 0985060 |
| OMC | 5.0L (504) | 1986–1998 | 0985060 |
| OMC | 5.7L (572/574) | 1986–1998 | 0985060 |
| OMC | 5.8L (584) | 1989–1996 | 0985060 |
| OMC | 7.4L (744) | 1988, 1990–1998 | 0985060 |
| OMC | 7.5L (754) | 1987–1990 | 0985060 |
| OMC | 8.2L (824/82) | 1992–1993, 1998 | 0985060 |
For Volvo Penta stern drives, this kit fits various SX, DP-S, and DP-SM models.
| Brand | Model | OEM Part No. |
|---|---|---|
| Volvo Penta | SX-C | 3854247 |
| Volvo Penta | SX-C1 | 3854247 |
| Volvo Penta | SX-C1AC | 3854247 |
| Volvo Penta | SX-C2AC | 3854247 |
| Volvo Penta | SX-CLT M10 | 3854247 |
| Volvo Penta | SX-CLT1 | 3854247 |
| Volvo Penta | SX-R | 3854247 |
| Volvo Penta | SX-R1 | 3854247 |
| Volvo Penta | SX-R2 | 3854247 |
| Volvo Penta | SX-S | 3854247 |
| Volvo Penta | SX-SLT | 3854247 |
| Volvo Penta | DP-S | 3854247 |
| Volvo Penta | DP-S1 | 3854247 |
| Volvo Penta | SX-RT2 | 3854247 |
| Volvo Penta | SX-CT | 3854247 |
| Volvo Penta | SX-CT1 | 3854247 |
| Volvo Penta | SX-CT2 | 3854247 |
| Volvo Penta | SX-RT1 | 3854247 |
Technical Specs
- Product Type
- Trim/Tilt Cylinder Repair Seal Kit
- Application
- Hydraulic trim/tilt cylinder rebuild
- Compatible Cylinders
- 3852414, 3850683, 3885196, 3857470, 3857471
- Kit Contents
- Seals, O-rings, wipers and backup rings
- Materials
- Marine-grade materials for salt water resistance
- Warranty
- Varies by seller (1-2 years typical)
What’s in the Box
- Seals
- O-rings
- Wipers
- Backup Rings
Installation Notes
- Ensure the engine is off and the stern drive is in a secure, supported position.
- Relieve any hydraulic pressure in the system before disconnecting lines.
- Carefully disassemble the trim/tilt cylinder, paying close attention to the order and orientation of the old seals.
- Clean all components thoroughly to remove old fluid and debris.
- Inspect the cylinder bore and rod for scratches or damage. Any imperfections can cause premature failure of new seals.
- Lubricate the new seals with clean hydraulic fluid before installation to prevent damage.
- Install the new seals, wipers, and O-rings using appropriate tools to avoid nicks or cuts.
- Reassemble the cylinder and torque all fasteners to manufacturer specifications.
- Reconnect hydraulic lines, fill the system with the recommended fluid, and bleed out any air according to your service manual.
- Cycle the trim/tilt system several times to ensure smooth operation and check for leaks.
Troubleshooting & FAQ
How do I know if my trim/tilt cylinder needs a new seal kit?
Common signs of failing seals include visible hydraulic fluid leaks around the cylinder, a "spongy" or weak trim response, or the stern drive slowly drifting down from its trimmed position.
Does this kit service one or both cylinders?
This kit contains all the necessary seals to rebuild one trim/tilt cylinder. If you need to service both cylinders on your stern drive, you must purchase two kits.
Is this kit compatible with my specific cylinder part number?
This kit is designed for rebuilding trim/tilt cylinders with the following part numbers: 3852414, 3850683, 3885196, 3857470, and 3857471. Always verify your cylinder part number before ordering.
What makes this aftermarket kit different from the OEM version?
Our aftermarket kits are engineered to meet or exceed OEM specifications for fit and function. They are made from high-quality, marine-grade materials suitable for saltwater environments, often providing better value. Some premium versions may even use upgraded materials like Viton for enhanced durability.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost?
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns?
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs 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 QC.
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