Mercury MerCruiser Quicksilver Driveshaft Slinger Ring 30271
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Mercury MerCruiser Quicksilver 25-30271 is a genuine Mercury Marine rubber ring used as a driveshaft / water pump housing slinger ring in select Mercury, Mariner, MerCruiser, and Mercury Racing gearcase applications. Mercury parts references list the original 25-30271 / 30271 as RING, Rubber and show it superseding to the current replacement 8M0214918.
Key Features
- Genuine Mercury Marine / Quicksilver rubber ring
- Commonly used as a driveshaft rubber slinger above the water pump housing
- Helps deflect water and protect the water pump housing area in supported gearcase assemblies
- Original Mercury reference: 25-30271 / 30271
- Current replacement reference: 8M0214918 / 25-8M0214918
- GTIN / UPC reference for 25-30271: 745061133952
- GTIN / UPC reference for 8M0214918: 678633180248
- Current replacement catalog package reference: approximately 0.23 in. x 1.13 in. x 0.38 in.
Engine Compatibility
This rubber ring appears across a wide range of Mercury and MerCruiser parts diagrams, including select Mercury / Mariner 75, 80, 85, 90, 95XR, V-135, V-150, V-175, V-200, V-220, V-225, Magnum, XR, jet-drive, and Mercury Racing applications, plus select older MerCruiser sterndrive and transom assembly diagrams depending on serial number range. Mercury diagrams also show 8M0214918 replacing 30271 in supported gear housing / pinion shaft housing component groups.
Serial Number Fitment Notice
Rubber slinger ring fitment depends on the exact engine, drive, gear housing, driveshaft, water pump housing, and serial number range. Always confirm compatibility using the Mercury or MerCruiser serial number and the exact parts diagram before ordering, especially where older 25-30271 has been replaced by 8M0214918.
When This Part Needs Replacement
Replace this ring if it is missing, hardened, cracked, stretched, loose on the driveshaft, distorted, or damaged during water pump or gearcase service. Rubber slinger rings are commonly overlooked during water pump work, but a worn or missing ring can allow water and debris to behave differently around the pump housing area.
Installation Notes
Install the ring in the correct position on the driveshaft above the water pump housing, following the Mercury service manual and parts diagram for the exact gearcase. During water pump service, confirm the ring is present, seated correctly, and not riding loosely on the shaft before reassembling the lower unit.
Alternate/Superseded Part Numbers
- 25-30271
- 30271
- 25-8M0214918
- 8M0214918
- Sierra 18-7426
- Mallory 9-76562
- GLM 21330
Parts Desk Insight
This part is easy to miss because it looks like a simple rubber ring, but its location above the water pump housing matters. If the lower unit is already apart for water pump service, checking and replacing a worn slinger ring is a small step that can help avoid repeat work.
Shipping: Ships same or next day for fast Canada wide shipping. ⚓
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 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.
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