Trim Tilt Hydraulic Ram Cylinder Hose Kit – Fits MerCruiser Alpha One & Bravo I, II, III (Replaces 32-99904Q, 32-864589, 32-864588)

Trim Tilt Hydraulic Ram Cylinder Hose Kit – Fits MerCruiser Alpha One & Bravo I, II, III

This complete aftermarket hydraulic hose kit is designed for MerCruiser Alpha One (with 15-9/16" trim cylinders) and all Bravo series (I, II, III, X, XR, XZ) stern drives. It provides a full replacement set for both port and starboard trim cylinders, featuring braided stainless steel construction for durability.

Directly Replaces MerCruiser Part Numbers: 32-99904Q, 32-864589, 32-864588, 9B-104, and 9B-121. Please note, this kit is not compatible with Alpha One Generation 2 models.

• Includes a complete set of 4 hydraulic trim lines for a full service.
• Features OEM-compatible fittings for a direct fit into MerCruiser trim systems.
• Constructed with a braided stainless steel outer layer for enhanced protection against abrasion and corrosion.

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

• 2 x Power Trim Hose (Replaces OEM 32-99904Q)
• 1 x Power Trim Hose (Replaces OEM 32-864589)
• 1 x Power Trim Hose (Replaces OEM 32-864588)

Installation Guide

1. Safety First: Ensure the engine is off, the drive is in the down position, and supported by a block or stand. Disconnect the battery.
2. Access Hoses: Locate the hydraulic trim hoses connecting the trim pump to the trim cylinders on both sides of the stern drive.
3. Relieve Pressure: Carefully loosen the manual release valve on the trim pump to relieve any stored hydraulic pressure.
4. Remove Old Hoses: Use appropriate wrenches to disconnect the old hoses from the cylinders and the pump manifold. Have rags ready to catch residual hydraulic fluid.
5. Install New Hoses: Match the new hoses to the correct ports based on their lengths and fittings. Hand-tighten the connections first to avoid cross-threading.
6. Tighten Fittings: Securely tighten all connections with a wrench. Do not overtighten, as this can damage the fittings or O-rings.
7. Refill and Bleed: Close the manual release valve. Fill the trim pump reservoir with the recommended hydraulic fluid. Cycle the trim up and down several times to bleed air from the system, topping off the fluid as needed.
8. Final Check: Inspect all connections for leaks. Clean up any spilled fluid and reconnect the battery.

Troubleshooting & FAQ

How do I confirm this kit fits my engine?
This kit is specifically for MerCruiser Alpha One drives that use 15-9/16" trim cylinders and all Bravo series stern drives. It is critical to confirm your cylinder size for Alpha One models. This kit will not fit Alpha One Gen 2 drives. Cross-reference your old hose numbers with the OEM part numbers listed: 32-99904Q, 32-864589, and 32-864588.

What are the signs my hydraulic hoses need replacing?
Common signs of failure include visible cracks, brittleness, or blistering on the hose exterior, fluid leaks at the fittings or along the hose length, and a spongy or slow response from your trim/tilt system.

Is this a complete kit for both sides of the drive?
Yes, this is a complete set of four hoses required to replace the lines on both the port and starboard trim cylinders.

OEM vs. Aftermarket?
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.

How fast do you ship and how much does it cost?
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.

What is your warranty and return policy?
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.