Sierra 18-7954-1 4-Stroke Outboard Oil Filter – Yamaha 200–450 HP
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Sierra 18-7954-1 4-Stroke Outboard Oil Filter – Yamaha High-Horsepower
A heavy-duty spin-on oil filter built for high-horsepower Yamaha 4-stroke outboards, from the V6 and V8 200–350 HP family through the XTO 425 and 450. The 18-7954-1 uses a heavy-wall, epoxy-coated steel canister with high-efficiency filter media and an anti-drain-back valve to protect Yamaha's high-output lubrication systems across the full service interval. It supersedes the earlier Sierra 18-7954.
Part Details
- Part Number: 18-7954-1
- Supersedes: Sierra 18-7954
- Brand: Sierra
- Type: Spin-on 4-stroke outboard oil filter
- Thread: 3/4"-16
- Canister: Heavy-wall steel, epoxy-coated for corrosion resistance
- Features: High-efficiency filtration media, anti-drain-back valve
- UPC: 808282388508
- Condition: New
Compatible Applications
- Yamaha VF200 / F200 4-stroke outboard
- Yamaha F225 / VF225 4-stroke outboard
- Yamaha F250 / VF250 4-stroke outboard
- Yamaha F300 4-stroke outboard
- Yamaha F350 4-stroke outboard
- Yamaha XTO 425 4-stroke outboard
- Yamaha XTO 450 4-stroke outboard
Exact model-year coverage varies. Always confirm your Yamaha model and existing filter number before ordering. The strongest fitment check is matching one of the Yamaha N26-13440 filter numbers below.
Cross-Reference Part Numbers
- Sierra: 18-7954-1 (supersedes 18-7954)
- Yamaha: N26-13440-00-00
- Yamaha: N26-13440-02-00
- Yamaha: N26-13440-03-00
- EMP: 35-57809
Service Interval
Replace at every scheduled oil change per Yamaha's 4-stroke maintenance program — typically every 100 hours or once per season, whichever comes first. Refer to your engine's owner's manual for the model-specific interval.
Installation Notes
- Remove the old filter and confirm its sealing gasket comes away with it — a stuck gasket causes an immediate oil leak at startup
- Clean the filter mounting surface thoroughly
- Lightly lubricate the new filter's gasket with clean engine oil before installing
- Install per Yamaha's service procedure — typically hand-tight plus 3/4 turn
- Run the engine and inspect for leaks before returning to service
Related Products
- Sierra 18-7906-2 – Oil Filter for Yamaha F150–F250 V6 & Mercury/Mariner F225
- Sierra 18-7902 – Oil Filter for Yamaha F15–F100 4-Stroke
- Sierra 9391 Yamaha 4-Stroke Oil Change Kit
- Sierra 9226 Complete Oil Change Kit – 4-Stroke Outboard
- Sierra 10W-30 FCW 4-Stroke Outboard Oil – 1 Gal
Parts Desk Insights
Oil filter, not fuel filter: The 18-7954-1 is an engine oil filter — it's occasionally confused with fuel filters due to similar sizing. Cross-referencing the Yamaha N26-13440 number is the clearest way to confirm you have the right part before ordering.
High-HP application: This filter is sized and rated for Yamaha's larger 200–450 HP 4-stroke families, including VMAX SHO V6/V8 and XTO offshore engines. If your Yamaha is in the 15–100 HP range, the Sierra 18-7902 or similar smaller-displacement filter is more likely the correct fit.
Most common install mistake: Leaving the old sealing gasket on the engine block. Always inspect the mounting surface before threading on the new filter — a double-stacked gasket causes an oil leak immediately on startup.
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.
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For return authorization, please contact our support team before shipping anything back.