Sierra 18-8780 Marine Oil Filter – Indmar 6.0L & 6.2L (S/N Above 164786)
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Sierra 18-8780 Marine Oil Filter – Indmar 6.0L & 6.2L
A heavy-duty marine spin-on oil filter designed specifically for Indmar 6.0L and 6.2L gasoline inboard engines with serial numbers above 164786. The 18-8780 replaces Indmar OEM filter 872024 and is built with an epoxy-coated steel canister, high-efficiency filter media, and an anti-drain-back valve to protect your engine's lubrication system between oil changes.
Part Details
- Part Number: 18-8780
- SKU: 47-8780
- Brand: Sierra
- Type: Spin-on marine engine oil filter
- Engine Family: Indmar 6.0L & 6.2L gasoline inboard
- Serial Range: Above 164786
- Replaces: Indmar 872024
- Canister: Heavy-wall steel, epoxy-coated for corrosion resistance
- Features: High-efficiency filtration media, anti-drain-back valve
- UPC: 808282382599
- Condition: New
Compatible Applications
- Indmar 6.0L gasoline inboard – serial number above 164786
- Indmar 6.2L gasoline inboard – serial number above 164786
Always confirm engine model and serial number before ordering. Sierra identifies serial number 164786 as the fitment break — 18-8780 applies to engines above that number. The strongest fitment check is matching Indmar part number 872024.
Cross-Reference Part Numbers
- Sierra: 18-8780 / 47-8780
- Indmar OEM: 872024
Service Interval
Replace at every scheduled oil change per Indmar's engine maintenance program — typically every 100 hours or once per season, whichever comes first. Refer to your engine's service manual for the exact 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 before installing
- Lightly lubricate the new filter's gasket with clean engine oil before threading on
- 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 18-8779 – Marine Oil Filter for Indmar 6.2L Ford Inboard (2015–2016)
- 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 18-7878-1 – Oil Filter for Ford/Chrysler/Volvo Short
- Sierra 18-7879-1 – Oil Filter for GM/Chevy V6
Parts Desk Insights
Serial number matters here: The 18-8780 is specifically for Indmar 6.0L and 6.2L engines with serial numbers above 164786. If your engine is below that serial number, this is not the correct filter — check the Indmar OEM catalog for the earlier application.
Easy to confuse with 18-8779: The Sierra 18-8779 is also an Indmar filter but is cataloged for a different Ford 6.2L application (2015–2016). These two filters are not interchangeable — always match by OEM part number and serial range, not by appearance.
Most common install mistake: Leaving the old sealing gasket stuck to the engine block. Always look for it before threading on the new filter — a double-stacked gasket causes an immediate oil leak 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.
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.