Mercury MerCruiser Quicksilver Oil Filter 8M0123025
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The Mercury MerCruiser Quicksilver Oil Filter 8M0123025 is a genuine Mercury replacement oil filter designed for select Mercury 3.4L V6 and 4.6L V8 FourStroke outboards. It provides efficient engine oil filtration, helping remove contaminants from the oil while supporting proper lubrication and long-term engine protection during routine service.
Key Features
- Genuine Mercury Marine replacement oil filter
- Part number: 8M0123025
- Also referenced as 35-8M0123025
- Fits select Mercury V6 and V8 FourStroke outboards
- Anti-drainback valve helps maintain startup lubrication and reduce dry starts
- Superior M-pleated filter media helps remove oil contaminants
- Spin-on design allows replacement with common tools and an oil filter wrench
Engine Compatibility
Fits select Mercury FourStroke outboards, including:
- 3.4L V6 FourStroke — 175–300 HP
- 4.6L V8 FourStroke — 175–300 HP applications
- Also commonly associated with select 450R 4.6L V8 Racing / Verado applications when matched by serial number and parts diagram
Serial Number Fitment Notice
Oil filter fitment can vary by horsepower, engine family, model year, and serial number range. Always confirm 8M0123025 against your engine serial number, original filter, owner's manual, or Mercury parts diagram before ordering.
When This Part Needs Replacement
Replace the oil filter during scheduled oil changes, seasonal service, winterization, or any time the filter is damaged, leaking, corroded, or overdue for maintenance. A clean oil filter helps protect internal engine components from abrasive contaminants and supports reliable engine operation.
Installation Notes
Lightly oil the new filter gasket before installation, spin the filter on until the gasket contacts the sealing surface, then tighten according to the engine service manual. After installation, run the engine, inspect for leaks, shut down, and recheck the oil level before returning the engine to service.
Alternate/Superseded Part Numbers
- Mercury: 8M0123025
- Mercury reference: 35-8M0123025
- Quicksilver related reference: 35-8M0176312 / 8M0176312
- Related prior references: 877767K01, 877767Q01
- Sierra aftermarket equivalent: 18-8703
Parts Desk Insight
This filter is tied to newer Mercury V6 and V8 FourStroke outboard platforms, so the safest match is by serial number and original filter number, not horsepower alone. The 3.4L V6, 4.6L V8, and Racing / Verado applications can look similar across model families, but the parts diagram should always be the final check.
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.
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.