Mercury Marine Prop Nut Kit | 8M0119410
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Mercury Marine Prop Nut Kit — Part #8M0119410
Keep your propeller properly secured with this OEM Prop Nut Kit from Mercury Marine. Designed for MerCruiser stern drive and Mercury outboard applications, this kit includes the correct nut, tab washer, and thrust hub hardware needed to safely retain your propeller on the shaft. Using genuine Mercury hardware ensures proper torque retention and eliminates the risk of propeller loss underway.
Part Details
- Part Number: 8M0119410
- Brand: Mercury Marine
- Product Type: Propeller Nut Kit / Propeller Hardware
- Condition: New OEM
Compatible Applications
- Mercury MerCruiser Alpha One stern drives
- Mercury MerCruiser Bravo One, Bravo Two, Bravo Three stern drives
- Mercury outboard motors (select models — verify by serial number)
- Verify fitment using your engine serial number before ordering
Kit Contents
- Propeller retaining nut
- Tab washer / locking washer
- Thrust hub hardware (as applicable to application)
Dimensions & Weight
- Compact kit — lightweight hardware components
- Refer to Mercury Marine service manual for torque specifications
System
Propeller retention system — stern drive and outboard propeller shaft hardware.
Service Interval
Inspect propeller nut and tab washer at every propeller removal. Replace tab washer any time the propeller is reinstalled — tab washers are single-use components. Replace the nut if threads are damaged or if the nut does not torque to specification.
Technical FAQ
- Can I reuse the tab washer? No — Mercury Marine specifies replacing the tab washer every time the propeller is removed and reinstalled.
- What torque spec applies to the prop nut? Refer to your engine's service manual for the correct torque value; specifications vary by model and shaft diameter.
- Do I need a prop wrench? Yes — a proper propeller wrench or strap wrench is recommended to hold the propeller during nut installation.
- Will this fit my older MerCruiser? Confirm compatibility using your engine serial number. This kit is designed for current-production Mercury Marine prop shaft hardware.
Parts Desk Insights
This is one of our most frequently ordered propeller service items. Customers most often order this kit after purchasing a new or replacement propeller, or following an impact event that required propeller removal. A very common oversight is skipping the tab washer replacement — this is a critical safety item. If you're reinstalling an existing propeller after trailering or off-season storage, we strongly recommend replacing the tab washer as part of that service. Pair this kit with the correct propeller for your application for a complete, ready-to-install solution.
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.