Mercury MerCruiser Quicksilver Propeller-Nut Cotter Pin 815026
In stock items ship same or next day.
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
Product Description
Mercury MerCruiser Quicksilver 18-815026 is the cotter pin used to secure the propeller-nut arrangement on specified Mercury and Mariner outboards. It is the retaining pin shown after the nut and washer in the applicable propeller-shaft diagram.
Key Features
- OEM propeller-hardware cotter pin, part 18-815026.
- GTIN: 745061054820.
- Application-specific locking pin for the propeller-nut arrangement.
Engine Compatibility
Verified uses include Mercury / Mariner 4–6HP FourStroke propeller hardware, Mercury / Mariner 8–9.9HP FourStroke standard gearcases from model year 2005 onward, and Mariner 9.9C (682) / 15C (684) applications. Confirm the propeller chart and gearcase design.
Installation Notes
Use a new correctly specified cotter pin after propeller service. Fit the thrust hardware, washer and propeller nut in the required order, tighten according to the owner’s manual, then secure the pin as instructed. Verify the pin is properly retained before operation.
Parts Desk Insight
Suffixes identify other cotter-pin sizes and retail packs. Match 815026 exactly rather than assuming 8150264 or a packaged Q variant is the same order quantity.
Manufacturer Parts Lookup
Use Mercury’s official parts finder to check the part against your engine or drive serial number.
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.