Volvo Penta SX Sterndrive Gear Unit Service Kit 3889597
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Volvo Penta SX Sterndrive Gear Unit Service Kit – Part #3889597
This genuine OEM service kit contains the seals, gaskets, and O-rings required to perform a complete gear unit rebuild on Volvo Penta SX stern drives. Designed for use when overhauling or resealing the lower gear unit after water intrusion, seal failure, or as part of a scheduled drive service. Using the factory kit ensures all sealing components meet Volvo Penta's original material and dimensional specifications for a reliable, long-lasting rebuild.
Part Details
- Part Number: 3889597
- Brand: Volvo Penta
- Product Type: Sterndrive Gear Unit Service Kit
- System: Sterndrive Lower Gear Unit
- OEM / Aftermarket: OEM (Genuine Volvo Penta)
- Contents: Complete seal, gasket, and O-ring set for gear unit overhaul as specified for this application
- Quantity: 1 kit
Compatible Applications
- Volvo Penta SX Stern Drive (gear unit applications — confirm by serial number)
Always confirm compatibility using your sterndrive model designation and serial number before ordering. Gear unit seal kits vary by drive generation and serial number break. Do not rely on visual comparison alone.
Refer to the Volvo Penta parts diagram for your specific drive to confirm diagram position and confirm this kit number before ordering: Volvo Penta Part Reference 3889597
Dimensions & Weight
- Packaged Weight: Approx. 1 kg (2.2 lb)
- Individual seal and gasket dimensions vary — refer to the parts diagram for positional reference
Service Interval
Inspect gear unit seals annually and replace at the first sign of oil weeping, water in the gear oil, or milky/discoloured lubricant. A full gear unit overhaul using this kit is typically required after water intrusion, a seal failure event, or at major service intervals as specified in the Volvo Penta stern drive service manual.
Parts Desk Insights
Best use case: This is the right kit when performing a full gear unit teardown and rebuild — it covers all the sealing surfaces in one purchase so you're not sourcing individual seals separately. It's the preferred choice for any shop doing a complete overhaul rather than a targeted single-seal replacement.
Common issue: Water in the gear oil is the most frequent reason customers need this kit. If the gear oil comes out milky or you find water in the lower unit, plan for a full reseal rather than a spot repair — partial reseals on an already-compromised gear unit typically lead to repeat failures within a season. Inspect the gear unit housing for scoring or corrosion before ordering; a reseal kit cannot repair a damaged bore or housing.
Technical FAQ
- How do I know if my gear unit needs a full reseal? Milky or water-contaminated gear oil, oil weeping from the drive housing, or a noticeable drop in gear oil level between services are the key indicators.
- Do I need to remove the sterndrive to use this kit? Yes — the gear unit must be removed from the boat and fully disassembled on a bench for a proper rebuild using this kit.
- What gear oil should I refill with after the rebuild? Use Volvo Penta Gear Oil or the specification listed in your SX drive service manual for your serial range.
- Is this kit compatible with all SX drives? No — SX drive generations and serial number breaks use different seal specifications. Confirm your exact drive model and serial number against the Volvo Penta parts diagram before ordering.
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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