3854247 Tilt Trim Cylinder Seal Kit for OMC Volvo | JLM Marine

3854247 Tilt Trim Cylinder Seal Kit for OMC Volvo | JLM Marine

This aftermarket tilt trim cylinder seal kit is designed to fit a wide range of OMC Cobra and Volvo SX series sterndrives. Engineered to replace OEM kit #0985060 and #3854247, it provides reliable sealing performance for multiple cylinder configurations across various engine displacements from 3.0L to 8.2L.

Direct Replacements: This kit replaces OEM part numbers 0985060, 0778202, and 3854247. OEM Kit #0985060 fits several cylinders, while OEM Kit #3854247 specifically fits cylinders 3852414 and 3885196.

• Complete seal kit for tilt trim cylinder repair
• Fits both OMC Cobra sterndrive and Volvo SX series applications
• Aftermarket proven parts designed for reliable performance

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Compatible Engine Models

Confirm your engine model/year in the table below.

Technical Specifications

Package Contents

This package includes the following components:

• 1 × Seal Kit

Installation Guide

1. Safety First: Disconnect the battery and relieve all hydraulic pressure from the tilt/trim system before beginning work.
2. Remove Cylinder: Carefully disconnect hydraulic lines and mounting hardware to remove the tilt trim cylinder from the sterndrive unit.
3. Disassemble Cylinder: Secure the cylinder in a soft-jaw vise and disassemble according to your service manual, noting the order of components.
4. Clean Components: Thoroughly clean all metal parts with solvent and inspect cylinder bore and piston rod for scoring or damage.
5. Remove Old Seals: Carefully remove all old seals, O-rings, and gaskets from the cylinder and piston assembly.
6. Install New Seals: Lubricate new seals with clean hydraulic fluid and install them carefully to avoid twisting or damage.
7. Reassemble Cylinder: Reassemble the cylinder components in reverse order, ensuring all parts are properly seated and aligned.
8. Reinstall Cylinder: Mount the cylinder back onto the sterndrive and reconnect all hydraulic lines with new O-rings where applicable.
9. Bleed System: Fill the system with fresh hydraulic fluid and bleed air from the lines according to manufacturer procedures.
10. Test Operation: Reconnect the battery and cycle the tilt/trim system through its full range several times to verify proper operation.
11. Check for Leaks: Inspect all connections and seals for hydraulic fluid leaks while the system is under pressure.
12. Final Inspection: Verify smooth operation and confirm no external leakage before returning the vessel to service.

Troubleshooting & FAQ

Q: How do I confirm this seal kit fits my specific tilt trim cylinder?
A: Cross-reference your cylinder part number with the compatible numbers listed. This kit replaces OEM #0985060 (for several cylinders) and #3854247 (specifically for cylinders 3852414 and 3885196). Verify your cylinder model against the compatible Volvo SX series and OMC Cobra engine list provided.

Q: What are the signs that my tilt trim cylinder seals need replacement?
A: Common symptoms include hydraulic fluid leaking from the cylinder body, slow or inconsistent tilt/trim operation, the drive unit drifting down when raised, or the tilt/trim motor running but the drive not moving. Any visible oil residue around the cylinder indicates seal failure.

Q: How often should I replace the tilt trim cylinder seals?
A: Seal replacement is typically done on an as-needed basis rather than a fixed interval. Inspect seals annually for leaks or damage, especially if your boat operates in harsh saltwater conditions. Most seals last several years with proper maintenance and fluid quality.

Q: Do I need special tools to install this seal kit?
A: Basic mechanical tools are required, including a soft-jaw vise, seal pick set, and torque wrench. A cylinder hone may be needed if the bore shows minor scoring. Always refer to your service manual for torque specifications and proper assembly procedures.

Q: What's the difference between OEM and aftermarket seal kits?
A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

• Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
• This product is an aftermarket replacement part and is not an OEM component.
• Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

• Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
• Fast Global Shipping: Free delivery worldwide in 5–15 days.
• Direct from Manufacturer: Competitive pricing without compromising quality.