Volvo Penta Trim/Tilt Seal Kit 3889431 – SX-M / SX-A Stern Drive
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Volvo Penta Trim/Tilt Seal Kit – Part #3889431
This OEM seal kit contains the seals required to service the trim and tilt cylinders on Volvo Penta SX-M and SX-A stern drives. Designed to restore proper hydraulic pressure and prevent fluid leaks that cause slow or erratic trim response. Using the factory kit ensures correct material, durometer, and dimensional tolerances for a lasting repair.
Part Details
- Part Number: 3889431
- Brand: Volvo Penta
- Product Type: Trim & Tilt Seal Kit
- System: Hydraulic Trim & Tilt
- OEM / Aftermarket: OEM (Genuine Volvo Penta)
Compatible Applications
- Volvo Penta SX-M Stern Drive
- Volvo Penta SX-A Stern Drive
Always confirm compatibility using your engine serial number and the applicable Volvo Penta parts diagram before ordering. Trim system components vary by serial number break and drive package.
Kit Contents
Complete seal set for trim/tilt cylinder service, including piston seals, rod seals, and O-rings as specified for this application. Contents meet OEM specifications for a full cylinder rebuild.
Dimensions & Weight
- Packaged Weight: Approx. 0.5 kg (1.1 lb)
- Compact kit; individual seal dimensions vary — refer to the parts diagram for positional reference.
Service Interval
Inspect trim seals annually or any time you notice slow trim response, fluid weeping at the cylinder, or the drive failing to hold trim position. Rebuild at the first sign of seal degradation to avoid damage to the cylinder bore.
Parts Desk Insights
Best use case: This kit is the right choice when the trim cylinder is leaking at the rod or piston and the cylinder bore is still in good condition — it restores a serviceable cylinder to factory spec at a fraction of the cost of a complete cylinder replacement.
Common issue: Trim seals on SX drives frequently fail after extended seasons without use or after exposure to contaminated hydraulic fluid. If the trim is slow or won't hold position and you see fluid weeping around the cylinder, this kit is typically the correct first repair step. Replace the hydraulic fluid at the same time for best results.
Technical FAQ
- Do I need to remove the drive to install this kit? Yes — the trim cylinders must be removed from the drive for a proper bench rebuild.
- What hydraulic fluid should I use after the rebuild? Volvo Penta Power Trim Fluid or a compatible ATF — check your service manual for the specification applicable to your serial range.
- How do I confirm this is the right kit for my drive? Match by stern drive model (SX-M or SX-A) and serial number using the Volvo Penta parts diagram for your specific drive assembly.
Related Parts
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 1-3 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
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We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
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