Sierra 2387 Oil Drain Screw
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
The Sierra 2387 Oil Drain Screw is a replacement lower-unit drain/fill screw for marine gearcase service—built for the drain location during routine gear oil changes.
Key Features
- Sierra replacement oil drain screw for lower-unit gearcase service
- Designed to be installed at the drain location when servicing lower unit/gear lube
- Replacement for applications that specify Sierra 2387 (47-2387)
Product Compatibility
- Outboard lower unit / gearcase oil service (drain-side screw)
Product Details
- Brand: Sierra
- Model/Part Number: 2387
- SKU: 47-2387
- Product Type: Oil drain screw (lower unit drain/fill screw for gear oil service)
Parts Desk Insights
Best Use Case: Replace the drain screw when performing lower-unit gear oil changes to help restore proper sealing at the drain point.
Common Issues: Common service concerns include using the correct mating washer/gasket for the drain/fill hardware and ensuring the screw seats squarely during reinstallation to help prevent seepage.
Related Products & Accessories
- Sierra 18-42481-9 Washer, 50PK - Used with Sierra 18-2387 drain screw (catalog note).
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
Returns & Satisfaction Guarantee
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.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.