Trim Cylinder Ram Rebuild Kit – Fits Volvo Penta 290 DP/SP Series (Replaces 3860881, 872612, 872837)
Trim Cylinder Ram Rebuild Kit – Fits Volvo Penta 290 DP/SP Series (Replaces 3860881, 872612, 872837) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Trim Cylinder Ram Rebuild Kit – Fits Volvo Penta 290 DP/SP Series (...
Product Details
This aftermarket Trim Cylinder Ram Rebuild Kit is designed for Volvo Penta 290, DP-A, DP-B, and SP-A Duo Prop sterndrive units manufactured between 1994 and 2008. It provides all the essential seals and components to restore the hydraulic integrity of your trim system, addressing common leaks and performance issues.
It serves as a direct replacement for Volvo Penta OEM part numbers 3860881, 872612, and 872837.
- Installation Method: Direct replacement for OEM components.
- Kit Contents: Includes seals and aluminum end caps to rebuild two trim cylinders.
- Warranty: Covered by a 1-year aftermarket warranty.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Volvo Penta | 3860881 |
| Volvo Penta | 872612 |
| Volvo Penta | 872837 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Volvo Penta | 290 | Various | 4-Stroke | 1994–2008 | 3860881 | Duo Prop applications |
| Volvo Penta | DP-A | Various | 4-Stroke | 1994–2008 | 3860881 | Duo Prop applications |
| Volvo Penta | DP-B | Various | 4-Stroke | 1994–2008 | 3860881 | Duo Prop applications |
| Volvo Penta | SP-A | Various | 4-Stroke | 1994–2008 | 3860881 | Duo Prop applications |
| Volvo Penta | SP-C | Various | 4-Stroke | 1994–2008 | 3860881 | Square capped hydraulic trim cylinder |
| Volvo Penta | SP-E | Various | 4-Stroke | 1994–2008 | 3860881 | Square capped hydraulic trim cylinder |
| Volvo Penta | DP-E | Various | 4-Stroke | 1994–2008 | 3860881 | Square capped hydraulic trim cylinder |
| Volvo Penta | DP-G | Various | 4-Stroke | 1994–2008 | 3860881 | Square capped hydraulic trim cylinder |
| Volvo Penta | DP-S | Various | 4-Stroke | 1994–2008 | 3860881 | Square capped hydraulic trim cylinder |
| Volvo Penta | DPX-A | Various | 4-Stroke | 1994–2008 | 3860881 | Square capped hydraulic trim cylinder |
| Volvo Penta | DPX-R | Various | 4-Stroke | 1994–2008 | 3860881 | Square capped hydraulic trim cylinder |
Technical Specs
- Product Type
- Trim Cylinder Ram Rebuild Kit
- Installation
- Direct replacement
- Housing Material
- Aluminum end caps
- Housing Color
- Silver/Metallic
- Product Dimensions
- 8.0" L x 8.0" W x 8.0" H
- Box Dimensions
- 8.0" L x 8.0" W x 8.0" H
- Warranty
- 1 Year (Aftermarket)
- Other Technical Attributes
- Kit contains seals and end caps for rebuilding two (2) trim cylinders
What’s in the Box
This kit contains all the necessary parts to rebuild TWO (2) trim cylinders:
- 2 x Outer Cylinder Cap O-Rings
- 2 x Inner Cylinder Cap O-Rings
- 2 x Cylinder Cap Wiper Seals
- 2 x Piston Seals
- 4 x Piston Back-up Rings (OEM style)
- 2 x Piston-to-Rod O-Rings
Installation Notes
- Safely secure the sterndrive unit in a raised position to prevent accidental lowering.
- Thoroughly clean the area around the trim cylinders to prevent dirt and debris from entering the hydraulic system.
- Carefully disconnect the hydraulic lines, cap them immediately, and drain the fluid into a suitable container.
- Remove the hardware securing the cylinder to the sterndrive and transom assembly.
- Unscrew the end cap from the cylinder body; a specialized pin spanner wrench may be required.
- Gently slide the piston rod assembly out of the cylinder tube.
- Carefully remove all old seals, o-rings, and back-up rings from the piston and end cap.
- Clean all components with a lint-free cloth and inspect for scratches, gouges, or corrosion.
- Lubricate the new seals with clean hydraulic fluid before carefully installing them in their respective grooves, ensuring correct orientation.
- Reassemble the piston rod into the cylinder, reinstall the end cap, and torque it to the manufacturer’s specification.
- Reinstall the cylinder, reconnect the hydraulic lines, and fill the reservoir with the recommended hydraulic fluid.
- Bleed the system by cycling the trim up and down several times to remove all air, and check for leaks.
Troubleshooting & FAQ
How do I know if this kit fits my sterndrive?
This kit is specifically designed for Volvo Penta sterndrive models including the 290 series and various DP/SP models with square-capped hydraulic trim cylinders from 1994–2008. Always verify that your cylinders are the square-cap style and cross-reference your OEM part number with 3860881, 872612, or 872837.
What are the signs my trim cylinder seals are failing?
Common symptoms include a visible hydraulic fluid leak around the cylinder caps or hoses, a sterndrive that drifts down after being trimmed up, or a "spongy" or slow trim response. An oily sheen on the water behind your boat is also a strong indicator of a leak.
Is this kit for one or two cylinders?
This comprehensive kit includes all the necessary seals and components to rebuild two (2) trim cylinders, providing a complete solution for one sterndrive unit.
Do I need special tools for this job?
You will likely need a pin spanner wrench to safely remove and reinstall the end caps without damaging them. Standard mechanical tools, a container for draining fluid, and a torque wrench are also required for a proper installation.
What's the difference between this kit and an OEM one?
Our aftermarket kit is engineered to meet or exceed OEM specifications for fit, form, and function. It uses high-quality materials comparable to the original, offering a cost-effective solution without sacrificing performance or durability.
How often should trim cylinder seals be replaced?
There is no fixed replacement interval; seals should be replaced when they show signs of failure. Proactive replacement during a major service (every 5-10 years) can prevent unexpected downtime, especially for boats used in saltwater.
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
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