Oil Line – OMC SX-M and Volvo Penta SX-M (Replaces Volvo Penta 3857523)
Oil Line – OMC SX-M and Volvo Penta SX-M (Replaces Volvo Penta 3857523) is backordered and will ship as soon as it is back in stock.
Couldn't load pickup availability
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
Oil Line – OMC SX-M and Volvo Penta SX-M (Replaces Volvo Penta 3857...
Product Details
This replacement Oil Line for OMC SX-M and Volvo Penta SX-M is engineered for a precise fit on OMC and Volvo Penta SX-M stern drives from 1994 and newer. It is also compatible with Volvo Penta DP, EF, PJX, SX, TSK, and WT drives, serving as the trim cylinder oil line for port-side, down-pressure connections.
It provides a direct interchange for Volvo Penta part number 3857523 and UanofCn 3857523, ensuring reliable performance for your hydraulic trim system.
- Installs as the port-side trim cylinder oil line.
- Features port down with fore connections.
- Constructed from durable stainless steel for corrosion resistance.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket suppliers.
| Brand | Part Number |
|---|---|
| UanofCn | 3857523 |
| Volvo Penta | 3857523 |
Engine & Model Compatibility
Confirm your engine model and year in the table below.
Designed for various OMC stern drive models from 1994 onward.
Designed for a wide range of Volvo Penta stern drive models, including SX-M, DP, and others from 1994 onward.
| Brand | Model | Years | OEM Part No. |
|---|---|---|---|
| OMC | SX-M | 1994–Up | 3857523 |
| Volvo Penta | SX-M | 1994–Up | 3857523 |
| Volvo Penta | DP | 3857523 | |
| Volvo Penta | EF | 3857523 | |
| Volvo Penta | PJX | 3857523 | |
| Volvo Penta | SX | 3857523 | |
| Volvo Penta | TSK | 3857523 | |
| Volvo Penta | WT | 3857523 |
Technical Specs
- Product Type
- Oil Line
- Installation
- Trim cylinder oil line
- Connection
- Port Down w/Fore Connections
- Housing Material
- Stainless Steel
- Housing Color
- Silver
- Dimensions
- 36.0 x 17.0 x 1.0 inches
- Weight
- 0.23 kg (8 ounces)
- Warranty
- 30 Days
What’s in the Box
- 1 x Oil Line (3857523)
Installation Notes
- Disconnect the boat's battery to prevent accidental operation of the trim system.
- Tilt the stern drive to the full "up" position and engage the trailering lock for safety.
- Place a drain pan and absorbent pads under the hydraulic connections to catch any spilled fluid.
- Using appropriate flare wrenches, carefully disconnect the old oil line fittings at the trim cylinder and the manifold.
- Remove the old line, noting its routing path.
- Install the new oil line, ensuring it follows the original path and is not kinked or twisted.
- Hand-tighten the fittings, then use a wrench to secure them another quarter-turn. Do not overtighten.
- Reconnect the battery and fill the trim pump reservoir with the manufacturer-recommended hydraulic fluid.
- Cycle the trim system up and down several times to bleed air, topping off the fluid as needed.
- Inspect all connections for leaks and wipe the area clean.
Troubleshooting & FAQ
How do I confirm this oil line fits my stern drive?
This line fits specific OMC and Volvo Penta models listed in the compatibility table, primarily SX-M drives from 1994 and newer. The key is to match your model and year, and confirm the part number 3857523. This is a port-side, down-pressure hose.
What are the signs of a failing trim oil line?
Common symptoms include visible hydraulic fluid leaks around the line or fittings, a spongy or slow trim response, or the stern drive failing to hold its position. Cracks, blisters, or brittleness in the hose material also indicate it needs replacement.
Can I replace just this one hose, or should I replace them in pairs?
While you can replace a single failed hose, it is often recommended to replace them in pairs (port and starboard), especially if they are of the same age. The other hose has been subjected to the same conditions and may fail soon.
What type of fluid is required after installation?
Always use the hydraulic trim fluid specified by your engine's manufacturer (e.g., Volvo Penta Power Trim/Tilt & Steering Fluid). Using the wrong type can damage seals and compromise system performance.
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 and specifications against 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.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
