Sierra 18-7914 4-Cycle Outboard Oil Filter – Mercury & Mariner FourStroke
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Sierra 18-7914 4-Cycle Outboard Oil Filter
Part Number: Sierra 18-7914 (SKU: 47-7914)
Brand: Sierra
Thread: 20 mm × 1.5
UPC: 808282113001
The Sierra 18-7914 is a marine-grade spin-on oil filter for selected Mercury and Mariner FourStroke outboards ranging from 25 HP through 115 HP. Built with a heavy-wall steel canister, epoxy-coated exterior, high-efficiency filter media, and an anti-drain-back valve, it meets or exceeds OEM specifications for routine oil-service intervals.
Key Features
- Heavy-wall steel canister construction
- Epoxy-coated exterior for corrosion resistance in saltwater environments
- High-efficiency filter media meets or exceeds OEM filtration standards
- Anti-drain-back valve retains oil after shutdown — prevents dry starts on next use
- 20 mm × 1.5 thread
Compatible Applications
- Mercury/Mariner 25 HP carbureted FourStroke, 2006 and earlier
- Mercury/Mariner 30 HP 3-cylinder FourStroke, 2005 and earlier
- Mercury/Mariner 40–60 HP FourStroke, 1998 and newer
- Mercury/Mariner 75–115 HP FourStroke (select serial ranges — confirm by OEM filter number)
Fitment Note: Mercury used several related 822626- and 8M-series oil filters across different FourStroke engine families. Always confirm horsepower, year, serial number, and existing OEM filter number before ordering. The strongest quick-match references are Mercury/Quicksilver 822626Q04 / Q05 / Q2 or the newer 8M0065103 / 8M0065104 / 8M0162830 family. The 20 mm × 1.5 thread is a useful secondary check.
Service Interval
Replace at every scheduled oil-service interval per Mercury’s maintenance guide — typically every 100 hours or annually, whichever comes first.
Installation Notes
- Remove the old filter and confirm its sealing gasket came off with it
- Clean the filter mounting surface
- Lightly lubricate the new gasket with clean engine oil before installation
- Install by hand per Mercury’s torque specification
- Inspect for leaks after startup
Cross-Reference / Alternate Part Numbers
- Sierra: 18-7914
- Mercury: 35-8226261 / 35-822626A2 / 35-822626K04 / 35-822626T2
- Mercury: 35-877768K01 / 35-8M0008397 / 35-8M0065104 / 35-8M0162829
- Quicksilver: 35-822626Q04 / 35-822626Q05 / 35-822626Q2
- Quicksilver: 35-8M0065103 / 35-8M0162830
- Fram: PH7317
- Wix: 51356
Parts Desk Insights
This is the go-to filter for Mercury FourStroke owners in the 40–60 HP range — it’s a high-volume fit that covers a wide span of popular recreational outboards. The most common customer question is whether it fits their specific year and serial number: the 822626Q04/Q05 cross-reference is the fastest way to confirm. Customers with 75–115 HP engines should pay close attention to the serial range note, as Mercury transitioned filter part numbers across those families. The anti-drain-back valve is worth highlighting for boaters who store seasonally — it keeps the filter primed for immediate oil pressure on startup.
Related Products
- Sierra 18-7913 4-Cycle Outboard Oil Filter – Mercury & Honda
- Sierra 18-7901 4-Cycle Outboard Oil Filter – Mercury/Mariner & Yamaha 8–9.9 HP
- Sierra 18-7906-2 4-Cycle Outboard Oil Filter – Yamaha F150–F250 & Mercury/Mariner F225
- Seachoice 50-21004 Full-Flow Oil Filter – Mercury & Mariner Outboard
- Seachoice 50-21009 Full-Flow Oil Filter – Mercury & Honda 4-Stroke
- Sierra 79151 4-Cycle Outboard Oil Filter
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.