Sierra 18-7910-1 Diesel Oil Filter – Yanmar & Westerbeke Marine Diesel
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Sierra 18-7910-1 Marine Diesel Oil Filter
Part Number: Sierra 18-7910-1 (SKU: 47-79101)
Brand: Sierra
Thread: 20 mm × 1.5
UPC: 808282305765
The Sierra 18-7910-1 is a marine-grade spin-on oil filter designed for selected Yanmar and Westerbeke diesel engines, with additional compatibility covering certain Honda BF-series marine outboards. Built with a heavy-wall steel canister, corrosion-resistant epoxy coating, and high-efficiency filtration media, it's engineered for reliable performance in demanding marine environments.
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 in the filter after shutdown — protects against dry starts
- 20 mm × 1.5 thread
Compatible Applications
- Yanmar marine diesel engines (119-series and 124450-series — confirm by OEM filter number)
- Westerbeke marine diesel engines (cross-references Westerbeke 30220)
- Honda BF75, BF90, BF115, BF130 marine outboards (select applications — verify by OEM filter reference)
Fitment Note: The strongest identification points for this filter are the 20 mm × 1.5 thread and OEM cross-references Westerbeke 30220, Yanmar 124450-35100, or Yanmar 119350-35150. Always confirm fitment against your engine's model and serial number before ordering.
Service Interval
Replace at every oil change per your engine manufacturer's scheduled maintenance interval. Regular replacement removes accumulated contaminants and maintains clean oil circulation.
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: 18-7910-1
- Westerbeke: 30220
- Yanmar: 124450-35100
- Yanmar: 119350-35150
- Yanmar: 119350-35151
- Yanmar: 119660-35150
- Baldwin: B179 / B227
- Fram: PH6607
- Mallory: 9-57810
Parts Desk Insights
This filter is a solid go-to for Yanmar and Westerbeke diesel owners doing routine oil changes. The anti-drain-back valve is a genuine advantage for engines that sit between seasons — it keeps the filter primed so you get immediate oil pressure on startup. Customers commonly ask about thread size: confirm 20 mm × 1.5 against your current filter or cross-reference Westerbeke 30220 or Yanmar 124450-35100 for a confident match.
Related Products
- Sierra 47-237800 Oil Filter – Westerbeke Marine Diesel Engine
- Sierra 18-7884 Diesel Oil Filter – Universal & Volvo Penta
- Sierra 18-0035 Diesel Full-Flow Oil Filter – Volvo Penta
- Sierra 18-0036 Diesel Bypass Oil Filter – Volvo Penta
- Sierra Oil Drain Kit – 1/2"-20 Thread, 42" Length (47-7891)
- Seachoice 50-21021 Full-Flow Oil Filter – 20 Micron | Yanmar & Westerbeke
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.