Sierra 18-8779 Marine Oil Filter – Indmar 6.2L Ford Inboard (2015–2016)
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Sierra 18-8779 Marine Oil Filter – Indmar 6.2L Ford Inboard
A marine-grade spin-on oil filter cataloged specifically for Indmar marine engines built on the Ford 6.2L gasoline platform. The 18-8779 is the Sierra replacement for Indmar 872025 and is engineered with an epoxy-coated interior canister to resist the corrosion and moisture common in marine engine compartments. Unlike automotive filters, this unit is rated for the extended service intervals and demanding conditions of marine inboard use.
Part Details
- Part Number: 18-8779
- SKU: 47-8779
- Brand: Sierra
- Type: Spin-on marine engine oil filter
- Engine Family: Indmar – Ford 6.2L gasoline inboard
- Model Years: 2015–2016
- Replaces: Indmar 872025
- Canister: Epoxy-coated interior for corrosion resistance
- UPC: 808282375782
- Condition: New
Compatible Applications
- Indmar marine inboard – Ford 6.2L gasoline V8 – 2015
- Indmar marine inboard – Ford 6.2L gasoline V8 – 2016
Always confirm engine manufacturer, displacement, model year, and existing OEM filter number before ordering. The strongest fitment check is matching Indmar part number 872025.
Cross-Reference Part Numbers
- Sierra: 18-8779 / 47-8779
- Indmar OEM: 872025
- Wix: 51372
- Motorcraft: FL-820
- Fram: PH2
Service Interval
Replace at every scheduled oil change per Indmar's engine maintenance program — typically every 100 hours or annually, whichever comes first. Always refer to your engine's service manual for the exact interval for your model year and application.
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 before installing
- Lightly lubricate the new filter's gasket with clean engine oil
- Install per Indmar's service procedure — typically hand-tight plus 3/4 turn
- Start the engine and inspect for leaks before returning to service
Related Products
- Sierra 18-7878-1 – Oil Filter for Ford/Chrysler/Volvo Short
- Sierra 18-7824-2 – Oil Filter for GM/Chevy Short | MerCruiser, OMC & Volvo Penta
- Sierra 18-7876-1 – Oil Filter for GM/Chevy Long
- Sierra 18-7879-1 – Oil Filter for GM/Chevy V6
- Sierra 18-57824 – MasterCraft & Ilmor GM LS V8 Remote Mount Oil Filter
Parts Desk Insights
Why this filter matters: The 18-8779 is cataloged specifically for the Indmar 6.2L Ford marine platform — a less common application than the GM-based engines found in most MerCruiser and Volvo Penta installations. If you’re servicing one of these Ford-powered Indmar boats, this is the correct Sierra filter. Using a generic automotive filter on a marine engine is not recommended — marine filters are designed for higher moisture exposure and longer drain intervals.
Most common mistake: Leaving the old sealing gasket on the engine block when swapping filters. Always inspect the mounting surface before threading on the new filter — a double-stacked gasket will cause an oil leak immediately on startup.
Servicing a different inboard engine? Check the Sierra 18-7824-2 for GM-based MerCruiser, OMC, and Volvo Penta applications, or the Sierra 18-7878-1 for other Ford/Chrysler/Volvo short-style applications.
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.