Hydraulic Power Trim Hose – Fits Johnson/Evinrude Outboard & OMC Cobra/Volvo Penta SX (Replaces 3853855, 0985615, 0778124, 0983947)
Hydraulic Power Trim Hose – Fits Johnson/Evinrude Outboard & OMC Cobra/Volvo Penta SX (Replaces 3853855, 0985615, 0778124, 0983947) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Hydraulic Power Trim Hose – Fits Johnson/Evinrude Outboard & OM...
Product Details
This Hydraulic Power Trim Hose is a direct-fit replacement for various outboard and sterndrive models. It is designed for Johnson/Evinrude 65–175 HP outboards from the 1990s to 2000s, OMC Cobra and Quiet Rider sterndrives (1994–1998), and Volvo Penta SX sterndrives (1994–2005).
It serves as a direct interchange for several part numbers, including Johnson/Evinrude 3853855, Volvo Penta 0985615, 0778124, and 0983947.
- Connects the manifold to the cylinder for starboard side "up" operation.
- Engineered to meet or exceed OEM specifications for fit and function.
- Backed by a 1-year manufacturer warranty.
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 outboards, this hose fits a range of 65 to 175 HP models from the 1990s through the 2000s.
For sterndrives, this part is compatible with OMC Cobra and Volvo Penta SX models manufactured in the specified year ranges.
| Brand | Model | Years | OEM Part No. | Notes |
|---|---|---|---|---|
| OMC | Cobra | 1994–1998 | 3853855 | |
| Volvo Penta | SX | 1994–2005 | 0985615/0778124/0983947 | SX-A introduced after 2005 |
Technical Specs
- Product Type
- Hydraulic Power Trim Hose
- Installation
- Connects manifold to cylinder for starboard up operation
- Connection
- Manifold to cylinder
- Application
- Starboard "Up" Hose
- Housing Color
- Black
- Warranty
- 1 Year
What’s in the Box
- 1 x Power Trim Hose (Replaces 3853855)
Installation Notes
- Tilt the outdrive to the full "up" position and engage the trailer lock for safety.
- Place absorbent rags or an oil pan beneath the hose connections to catch any hydraulic fluid.
- Using appropriate line wrenches to prevent stripping, carefully loosen and disconnect the fittings at both the manifold and trim cylinder.
- Remove the old hose. Before installing the new one, compare them side-by-side to confirm an identical match in length and fittings.
- Install the new hose, threading the fittings by hand first to prevent cross-threading, then tighten them securely. Do not overtighten.
- Lower the outdrive, then cycle the power trim up and down 5-6 times to bleed any trapped air from the system.
- With the drive fully down, check the hydraulic fluid level in the reservoir and top it off with the manufacturer-recommended trim/tilt fluid.
- Thoroughly inspect both connections for any signs of leakage.
Troubleshooting & FAQ
Is this the correct hose for my engine?
This is the starboard side "up" hose. It is designed for specific Johnson/Evinrude outboards (65-175 HP, approx. 1990s-2000s) and sterndrives like the OMC Cobra (1994–1998) and Volvo Penta SX (1994–2005). Always verify your engine model, year, and original part number against the information on this page before ordering.
What is the difference between an "up" and "down" hose?
Power trim systems use hydraulic pressure to move the drive, requiring separate hoses for tilting up and tilting down. This hose is specifically for the "up" circuit on the starboard side and is not interchangeable with the "down" hose.
My original part number isn't 3853855. Will this fit?
It may. This hose is a direct cross-reference for several part numbers. Please check our Part Number Matrix section to confirm if your original part number is listed as an equivalent to Johnson/Evinrude 3853855, Volvo Penta 0985615, or another compatible number.
What are common symptoms of a bad trim hose?
Signs of a failing power trim hose include visible hydraulic fluid leaks near the engine or fittings, a slow or "spongy" trim response, or the outdrive slowly drifting down from a tilted position.
Do I need special tools for installation?
Professional installation is recommended. However, if you are performing the replacement, you will need a set of flare-nut or line wrenches to avoid damaging the soft metal of the hose fittings. You will also need the correct hydraulic trim fluid for your system.
How often should I replace trim hoses?
There is no fixed replacement interval. Hoses should be inspected at least annually for cracking, blistering, or brittleness. It is best practice to replace them proactively at the first sign of wear to prevent a failure on the water.
Is this an aftermarket or OEM part?
This listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials. Our parts are manufactured in an ISO 9002 facility and are batch-inspected for quality and consistency.
How fast is shipping?
We ship worldwide quickly—typical transit time is 5–15 days. Standard shipping is free, and expedited options will appear at checkout if they are available for your location.
What is the warranty and return policy?
This part is covered by a 1-year warranty against manufacturing defects under normal marine use. If an issue arises, please contact our support team with your order details. Returns are accepted within our standard window for items that are unused and in original condition. See our full policy page or reach out for instructions.
Safety & Important Info
- Always verify the product images and specifications against your original part before installation. If anything differs—even if your model is listed as compatible—do not install the part and contact us for assistance.
- This is an aftermarket replacement component, not an original equipment manufacturer (OEM) part.
- Professional installation by a qualified marine mechanic is strongly recommended for safety, proper function, and to prevent damage to your equipment.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and rigorously tested for real-world reliability.
- Fast Global Fulfillment — With free standard delivery to most regions, you can expect your parts in 5–15 days.
- Manufacturer-Direct Value — By working directly with manufacturers, we offer fair pricing without compromising on materials or quality control.
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