Sierra 18-7915-1 4-Cycle Outboard Oil Filter – Suzuki DF-Series & Johnson/Evinrude
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Sierra 18-7915-1 4-Cycle Outboard Oil Filter
Part Number: Sierra 18-7915-1 (SKU: 47-79151)
Brand: Sierra
Thread: 3/4–16
UPC: 808282205621
The Sierra 18-7915-1 is a marine-grade spin-on oil filter for selected Suzuki DF-series and Johnson/Evinrude 4-stroke outboards in the 25–70 HP range. 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 scheduled lubrication service.
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
- 3/4–16 thread
Compatible Applications
- Johnson/Evinrude 25 HP 4-stroke (approx. 1998–2005)
- Johnson/Evinrude 30 HP 4-stroke (approx. 1998–2005)
- Johnson/Evinrude 40 HP 4-stroke (approx. 1998–2005)
- Johnson/Evinrude 50 HP 4-stroke (approx. 1998–2005)
- Johnson/Evinrude 60 HP 4-stroke (approx. 1998–2005)
- Johnson/Evinrude 70 HP 4-stroke (approx. 1998–2005)
- Suzuki DF-series 25–70 HP 4-stroke outboards (cross-references 16510-87J00 family)
Fitment Note: Confirm engine model, horsepower, model year, and existing OEM filter number before ordering. The strongest quick-match references are Suzuki 16510-87J00 / 16510-87J01 or Johnson/Evinrude 778885 / 5031411. Exact model year coverage varies by horsepower rating.
Service Interval
Replace at every scheduled oil-service interval per your outboard manufacturer’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 your engine manufacturer’s torque specification
- Inspect for leaks after startup
Cross-Reference / Alternate Part Numbers
- Sierra: 18-7915-1
- Johnson/Evinrude: 778885 / 5031411
- Suzuki: 16510-87J00 / 16510-87J01 / 16510-87J02 / 16510-87JL0
- Mallory: 9-57817
- Fram: PH7575
- Wix: 51348
Parts Desk Insights
This filter covers the Suzuki-built Johnson/Evinrude 4-stroke family from the late 1990s through mid-2000s — a common ownership group still actively doing maintenance on these engines. The fastest fitment confirmation is Suzuki 16510-87J00 or J–E 778885; customers who have one of those numbers can order with confidence. A frequent question: does this fit the DF70? Yes, for the DF-series 70 HP with the 16510-87J-series filter — but always verify by the existing filter number, as Suzuki revised part numbers across production runs. The anti-drain-back valve is worth mentioning to customers who store seasonally, as it keeps oil in the filter for immediate pressure on startup.
Related Products
- Sierra 18-7896 4-Cycle Outboard Oil Filter – Suzuki DF-Series & Johnson/Evinrude
- Sierra 18-7897 4-Cycle Outboard Oil Filter – Suzuki DF115/DF140 & Johnson/Evinrude
- Sierra 18-7903 4-Cycle Outboard Oil Filter – Suzuki DF9.9/DF15 & Johnson/Evinrude
- Seachoice 50-21019 Full-Flow Oil Filter – Suzuki & Johnson/Evinrude 4-Stroke
- Sierra 7916 4-Cycle Outboard Oil Filter
- Sierra 8870 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.