Hydraulic Power Trim Hose – Fits Johnson/Evinrude Outboard & OMC Cobra/Volvo Penta SX (Replaces 3853855)

Hydraulic Power Trim Hose – Fits Johnson/Evinrude Outboard & OMC Cobra/Volvo Penta SX (Replaces 3853855)

This hydraulic power trim hose is a direct replacement for a wide range of outboard and sterndrive models. It is specifically designed for starboard up operation, connecting the manifold to the cylinder.

This part replaces multiple OEM numbers, including Johnson/Evinrude 3853855, Volvo Penta 0985615, Volvo Penta 0778124, Volvo Penta 0983947, Mallory Marine 9-71603, and Sierra 18-2133.

• Function: Starboard up hydraulic hose
• Connection: Manifold to cylinder
• Package Includes: 1x Power Trim Hose

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 Johnson/Evinrude owners, here’s a guide to help you identify your engine’s serial/model: Johnson/Evinrude Serial Number Guide.

Johnson/Evinrude Outboard Models

Sterndrive Models

Technical Specifications

Package Contents

• 1 x Power Trim Hose (3853855)

Installation Guide

1. Safety First: Turn off the engine and disconnect the battery to prevent accidental operation of the trim system.
2. Locate the Hose: Identify the starboard up hydraulic hose connecting the trim manifold to the trim cylinder.
3. Prepare for Fluid: Place absorbent rags or a container beneath the hose connections to catch any hydraulic fluid that may spill.
4. Disconnect Old Hose: Using the appropriate wrenches, carefully loosen and disconnect the fittings at both the manifold and cylinder ends.
5. Remove Old Hose: Once disconnected, carefully remove the old hose from the engine. Note its routing.
6. Install New Hose: Route the new hose following the path of the original.
7. Secure Connections: Attach and tighten the fittings on the new hose. Do not overtighten, but ensure they are snug to prevent leaks.
8. Check Fluid Level: Top off the hydraulic trim fluid reservoir to the recommended level.
9. Test System: Reconnect the battery. Operate the trim system up and down several times to circulate the fluid and purge any air.
10. Inspect for Leaks: Carefully inspect both ends of the new hose for any signs of hydraulic fluid leaks.

Troubleshooting & FAQ

How do I confirm this is the right hose for my boat?
This specific hose is the starboard up hose, which runs from the manifold to the cylinder. Please verify this matches the hose you are replacing. Also, check the compatible model tables and part-number cross-reference on this page to ensure it matches your engine.

What are the signs of a failing power trim hose?
Common symptoms include visible hydraulic fluid leaks around the hose or its fittings, a spongy or slow response when operating the trim, or the inability of the trim system to hold the engine at a set position.

Which engine brands is this hose compatible with?
This aftermarket hose is designed to fit specific Johnson/Evinrude outboard models (65-175 HP from the 1990s-2000s), OMC Cobra and Quiet Rider sterndrives (1994-1998), and Volvo Penta SX sterndrives (1994-2005).

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.