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Mercury Heavy Duty Propeller Washer 8M0204711
| Quantity | Price |
| 1 | 29.46 |
Mercury Propeller Hardware
Mercury Heavy Duty Propeller Washer 8M0204711
Mercury 8M0204711 is a propeller washer used during propeller installation on select Mercury outboards, MerCruiser sterndrives, and Mercury Racing applications. It is commonly used as part of the propeller hardware stack to help retain the prop nut on the shaft.
This washer supersedes Mercury part numbers 8403831 and 840383 and may also be shown as 12-8M0204711. Fitment varies by gearcase, drive, prop shaft size, and propeller hardware setup, so verify by model and serial number before ordering.
Compatible Applications
| Brand | Engine / System | Application | Fitment Note |
|---|---|---|---|
| Mercury | Select outboards | Propeller shaft hardware | Common on larger or heavy-duty prop shaft applications where this washer is listed |
| Mercury Racing | Select Sport Master and Torque Master style gearcases | Prop nut retaining washer | Often associated with heavy-duty propeller hardware and larger prop shafts |
| MerCruiser / Mercury Racing | Select performance sterndrives | Propeller installation hardware | Common on Bravo XR and similar heavy-duty prop shaft applications where specified |
Important Fitment Note
Propeller washers vary by prop shaft size, gearcase, drive type, and propeller hardware kit. Always confirm compatibility using your engine or drive serial number, prop shaft size, and existing hardware before ordering.
OEM & Cross Reference Numbers
| Current Mercury Number | 8M0204711, 12-8M0204711 |
| Superseded Mercury Numbers | 8403831, 840383 |
| Description | Propeller washer / retaining washer |
What This Part Is Used For
This propeller washer is installed with the propeller hardware on select Mercury and MerCruiser propeller shafts. It helps support proper prop nut retention and is often used as part of the propeller hardware kit.
Replace damaged, bent, corroded, or missing propeller washers during prop service. Reusing worn prop hardware can increase the chance of improper nut retention or hardware loosening during operation.
Key Features and Benefits
- Current Mercury number 8M0204711
- Also listed as 12-8M0204711
- Supersedes Mercury 8403831 and 840383
- Used as propeller retaining hardware on select Mercury and MerCruiser applications
- Common service item during propeller changes, gearcase service, or prop hardware replacement
- Helps maintain proper prop nut retention when installed with the correct hardware stack
FAQ
Is 8M0204711 the same as 8403831 and 840383?
Yes. Mercury 8M0204711 is the current number and supersedes 8403831 and 840383.
Where does this washer install?
It installs on the propeller shaft as part of the propeller hardware stack and helps retain or lock the prop nut, depending on the application.
Does this fit all Mercury propellers?
No. Fitment depends on the gearcase, drive model, prop shaft size, and hardware kit. Verify your serial number and existing prop hardware before ordering.
Dealer Discounts & Store Policies
Dealer / Marine Industry Discounts
Are you a marine dealer, technician, boat builder, or industry professional? We offer dealer pricing for qualified marine businesses.
Shipping Policy
- Free shipping on orders over $100 continental U.S.
- Orders ship via UPS, USPS, and FedEx.
- Orders received before 5:30 PM EST ship the same business day.
- Typical delivery time is 1-5 business days.
30-Day Return Policy
- Returns accepted within 30 days of delivery.
- Parts must be new, unused, and in original packaging.
- Installed parts are not returnable.
- Return authorization is required before sending items back.
Need help with a return or order question?
Contact Us
Phone: 941-721-3000
Searchable Terms
Mercury propeller washer, Mercury prop washer, Mercury retaining washer, Mercury tab washer, MerCruiser propeller washer, Mercury Racing prop hardware, Sport Master prop washer, Torque Master prop washer, Bravo XR prop washer, heavy duty prop shaft washer, prop nut washer
Searchable Part Numbers
8M0204711, 12-8M0204711, 8403831, 840383