Gearcase Drain Screw & Sealing Washer Set – 2-Pack Marine
Gearcase Drain Screw & Sealing Washer Set – 2-Pack Marine
Marine Gearcase Drain Screw Set with Sealing Washers – 2-Pack
Keep your lower unit service running smoothly with this ready-to-install 2-Piece Gearcase Drain Screw Set. Each pack includes two slotted metal drain screws and two matching sealing washers — everything you need for a complete, leak-free gearcase oil drain service in one convenient package.
Made in Mainland China.
Key Features
- Direct Replacement Hardware: Designed as a drop-in replacement for worn or damaged marine gearcase drain screws during routine lower unit oil service.
- Complete Service Kit: Comes with 2 drain screws and 2 sealing washers — all the hardware needed for a clean, proper gearcase service in a single package.
- Slotted Metal Construction: Each screw features durable metal threads and a clearly defined slotted head profile for easy identification and straightforward installation.
- OEM Cross-Reference Ready: Compatible with OEM part numbers 8M0058389, 8M0058389-10, and 79953Q04 — use these references to confirm fitment before ordering.
- Ideal for Scheduled Maintenance: A smart addition to any boat owner's or marine technician's spare parts inventory for planned gearcase maintenance intervals.
Specifications
| Product Name | 2-Piece Drain Screw Set with Seal Rings |
| OEM Number | 8M0058389 |
| Replacement Numbers | 8M0058389-10, 79953Q04 |
| Material | Metal |
| Installation | Direct Replacement |
| Application | Select Marine Engines / Lower Units |
| Battery Required | No |
Package Contents
- 2 × Gearcase Drain Screws
- 2 × Sealing Washers (Seal Rings)
Important Notes
- Please allow a 1–2 cm measurement tolerance due to manual measurement methods.
- Colors may vary slightly from product images due to differences in monitor settings.
- Always verify OEM part numbers against your engine model before ordering to confirm compatibility.
Learn more: FuelEconomy.gov driving efficiency guidance
Frequently Asked Questions
Q: What OEM part numbers does this gearcase drain screw set replace?
A: This marine gearcase drain screw set is cross-referenced with OEM part numbers 8M0058389, 8M0058389-10, and 79953Q04. Always verify these numbers against your specific engine model or lower unit to ensure a proper fit before ordering.
Q: What is included in this gearcase drain screw service pack?
A: Each package includes 2 slotted metal drain screws and 2 matching sealing washers (seal rings), providing a complete set of replacement hardware for a full gearcase oil drain service on select marine lower units.
Q: Is this a direct replacement for my marine lower unit drain screw?
A: Yes — this set is designed as a direct replacement for compatible marine gearcase drain screws. The slotted head profile and metal thread construction allow for straightforward, tool-assisted installation during routine lower unit oil change service.
Q: How do I know if this drain screw is compatible with my outboard engine?
A: Cross-reference the listed OEM numbers (8M0058389, 8M0058389-10, 79953Q04) with your engine's parts manual or existing drain screw hardware. If your current drain screw matches any of these numbers, this set is the correct replacement for your gearcase service needs.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.