Hydraulic Power Trim Hose – Fits Johnson/Evinrude & OMC Cobra/Volvo Penta SX (Replaces 3853855)
Hydraulic Power Trim Hose – Fits Johnson/Evinrude & OMC Cobra/Volvo Penta SX (Replaces 3853855) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
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Hydraulic Power Trim Hose – Fits Johnson/Evinrude & OMC Cobra/V...
Product Details
This high-pressure Hydraulic Power Trim Hose is designed for the starboard 'up' operation in various marine engines. It fits a range of Johnson/Evinrude outboards from 65 to 175 HP (model years 1990s–2000s) and is also compatible with OMC Cobra and Volvo Penta SX sterndrive models from approximately 1994 to 2005.
It serves as a direct cross-reference for Johnson/Evinrude part 3853855, Volvo Penta parts 0985615, 0778124, and 0983947, as well as aftermarket numbers Mallory 9-71603 and Sierra 18-2133.
- Function: Connects the hydraulic manifold to the trim cylinder for starboard up movement.
- Application: Suitable for Johnson/Evinrude outboards and OMC/Volvo Penta sterndrives.
- Contents: Includes one hydraulic hose as pictured.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Johnson/Evinrude | 3853855 |
| Volvo Penta | 0985615 |
| Volvo Penta | 0778124 |
| Volvo Penta | 0983947 |
| Mallory Marine | 9-71603 |
| Sierra | 18-2133 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Johnson/Evinrude: This hose fits a wide variety of outboard models from 65 to 175 HP manufactured in the 1990s and 2000s.
For OMC & Volvo Penta: This part is designed for OMC Cobra sterndrives (1994–1998) and Volvo Penta SX sterndrives (1994–2005), prior to the introduction of the SX-A models.
| Brand | Model | Rated HP | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Johnson/Evinrude | Various | 65 HP | 3853855 | Fits models from approx. 1990s–2000s | |
| Johnson/Evinrude | Various | 80 HP | 3853855 | Fits models from approx. 1990s–2000s | |
| Johnson/Evinrude | Various | 88 HP | 3853855 | Fits models from approx. 1990s–2000s | |
| Johnson/Evinrude | Various | 90 HP | 3853855 | Fits models from approx. 1990s–2000s | |
| Johnson/Evinrude | Various | 100 HP | 3853855 | Fits models from approx. 1990s–2000s | |
| Johnson/Evinrude | Various | 105 HP | 3853855 | Fits models from approx. 1990s–2000s | |
| Johnson/Evinrude | Various | 115 HP | 3853855 | Fits models from approx. 1990s–2000s | |
| Johnson/Evinrude | Various | 150 HP | 3853855 | Fits models from approx. 1990s–2000s | |
| Johnson/Evinrude | Various | 175 HP | 3853855 | Fits models from approx. 1990s–2000s | |
| OMC | Cobra | Various | 1994–1998 | 3853855 | |
| OMC | Quiet Rider | Various | 3853855 | ||
| Volvo Penta | SX | Various | 1994–2005 | 0985615/0778124/0983947 | Fits models produced before SX-A |
Technical Specs
- Product Type
- Hydraulic Power Trim Hose
- Function
- Connects manifold to cylinder for starboard up operation
- Connection Style
- Manifold to cylinder
- Hose Color
- Black
- Designation
- Starboard Up Hose
- Warranty
- 1 Year
What’s in the Box
- 1 x Power Trim Hose (Replaces 3853855)
Installation Notes
- Disconnect the battery and relieve any pressure in the hydraulic system.
- Place absorbent rags or a container below the hose connections to catch any hydraulic fluid.
- Carefully disconnect the fittings at both the manifold and cylinder ends of the old hose.
- Remove the old hose, noting its routing path.
- Install the new hose, ensuring it is not kinked or twisted.
- Securely tighten the fittings according to the engine manufacturer's torque specifications.
- Refill the hydraulic system with the recommended fluid and bleed any air from the system.
- Reconnect the battery and operate the trim system several times, checking for leaks and smooth movement.
Troubleshooting & FAQ
Which specific engines does this hose fit?
This hose is designed for Johnson/Evinrude outboards (65–175 HP, approx. 1990s–2000s), OMC Cobra sterndrives (1994–1998), and Volvo Penta SX sterndrives (1994–2005). Please refer to the compatibility table for detailed model information.
Is this hose for the port (down) or starboard (up) side?
This is the starboard "up" hose, which connects the manifold to the hydraulic trim cylinder to lift the drive.
What are the symptoms of a failing power trim hose?
Common signs include visible hydraulic fluid leaks around the transom assembly, a slow or "spongy" trim response, or the inability of the trim system to hold the engine/drive at a set height (drifting down).
Is there a recommended replacement schedule for these hoses?
There is no universal replacement interval. We recommend inspecting all hydraulic hoses annually for signs of aging such as cracks, blisters, abrasions, or leaks. Replace any hose that shows signs of deterioration immediately.
Does this hose include new o-rings or fittings?
The package includes one power trim hose. Associated hardware like o-rings or fittings are not included and should be sourced separately if needed.
Which part numbers does this directly replace?
This part is a direct interchange for Johnson/Evinrude 3853855, Volvo Penta 0985615, 0778124, 0983947, and aftermarket parts Mallory 9-71603 and Sierra 18-2133.
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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