806191T Trim Cylinder End Cap Assembly for MerCruiser Alpha I Gen II Bravo | JLM Marine

806191T Trim Cylinder End Cap with Seals for MerCruiser Alpha I Gen II Bravo | JLM Marine

This Trim Cylinder End Cap with Seals is engineered as a direct replacement for MerCruiser stern drive systems, including Alpha Generation I, Alpha Generation II, and Bravo models. Designed to restore hydraulic integrity to your trim ram assembly, this end cap ensures reliable performance and proper sealing under demanding marine conditions.

This aftermarket replacement consolidates multiple OEM part numbers—including 806191T, 14698, 14698T, 14698T10, 8M0110717, 8M0115362, 8M0118340, and 98-8M0118340—offering broad compatibility across MerCruiser trim systems. Built to OEM specifications, it provides a cost-effective solution without compromising quality or fit.

• Seals Included: Complete with all necessary seals for a leak-free installation
• Direct Replacement: Fits MerCruiser Alpha I, Gen II, and Bravo trim cylinders
• Comprehensive Compatibility: Replaces eight OEM part numbers for wide coverage

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. For Mercury owners, here's a guide to help you identify your engine's serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.

Technical Specifications

Package Contents

• 1 × Trim Cylinder End Cap
• 1 x Seals

Installation Guide

1. Relieve hydraulic pressure: Lower the stern drive completely and turn off all power to the trim system.
2. Remove the old end cap: Use appropriate wrenches to carefully unscrew the existing trim cylinder end cap. Have a drain pan ready to catch any hydraulic fluid.
3. Inspect the cylinder bore: Check for scoring, corrosion, or damage inside the cylinder. Clean thoroughly with a lint-free cloth and hydraulic-safe solvent.
4. Install new seals: Lubricate the new seals with clean hydraulic fluid and carefully position them in the grooves of the new end cap according to OEM specifications.
5. Thread the new end cap: Hand-tighten the end cap onto the trim cylinder, ensuring proper alignment to avoid cross-threading.
6. Torque to specification: Use a torque wrench to tighten the end cap to MerCruiser's recommended torque value (consult your service manual for exact specifications).
7. Refill hydraulic fluid: Add the correct type and amount of hydraulic fluid to the trim reservoir. Check your owner's manual for fluid type and capacity.
8. Bleed the system: Cycle the trim system up and down several times to purge air from the hydraulic lines. Top off fluid as needed.
9. Inspect for leaks: With the engine running, operate the trim system through its full range and check all connections for hydraulic leaks.
10. Final check: Verify smooth trim operation and confirm no fluid loss after several cycles.

Troubleshooting & FAQ

Q: How do I confirm this end cap fits my MerCruiser stern drive?
A: This end cap is designed for MerCruiser Alpha Generation I, Alpha Generation II, and Bravo stern drives. Cross-reference your current part number with the list provided (806191T, 14698, 8M0110717, etc.), or consult your engine's parts diagram using the links above to verify compatibility.

Q: What are the signs that my trim cylinder end cap needs replacement?
A: Common symptoms include hydraulic fluid leaking from the trim cylinder, slow or erratic trim operation, inability to hold trim position, or visible damage to the end cap threads or seal surfaces. If you notice any of these issues, inspect and replace the end cap as needed.

Q: Are the seals pre-installed or do I need to install them separately?
A: The seals are included in the package but typically require installation during assembly. Lubricate each seal with clean hydraulic fluid and carefully seat them in the end cap grooves before threading the cap onto the cylinder to ensure proper sealing.

Q: How often should I replace the trim cylinder end cap?
A: Replacement is condition-based rather than time-based. Inspect the end cap and seals annually or whenever you perform trim system maintenance. Replace immediately if you observe leaks, damaged threads, or seal deterioration to prevent hydraulic system failure.

Q: What is the difference between this aftermarket part and the OEM version?
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.