Sierra / Marine Oil Filter GM Chevrolet Long Style / 47-78761
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Marine Oil Filter for GM/Chevrolet Engines — Long Style
The Sierra 47-78761 is a long-style marine oil filter for GM and Chevrolet-based marine engines commonly found in MerCruiser sterndrives and inboard applications. The long-style configuration provides increased filter media surface area for extended filtration capacity, and is specified where engine bay clearance allows for the longer housing.
Key Features
- Application: GM and Chevrolet-based marine engines — long style
- Filter Style: Long — greater filter media area vs. short style; use where clearance permits
- Marine-Grade Construction: Built to withstand the vibration, heat cycles, and extended run times typical of marine engine use
- Direct Replacement: Designed as a service replacement for compatible GM/Chevrolet-based marine engines
Fitment Notice
Confirm fitment by engine make, model, year, and displacement before ordering. GM and Chevrolet-based marine engines are used across multiple sterndrive and inboard platforms. Verify the correct filter thread size, bypass valve rating, and anti-drainback valve requirement for your specific engine. Confirm whether your installation requires the long or short style before ordering.
Installation Notes
Drain the engine oil fully before replacing the filter. Lightly lubricate the filter gasket with clean engine oil before installation. Tighten hand-tight plus 3/4 turn, or to the torque specification in your engine service manual. Do not over-tighten. Check for leaks after the first start and verify oil pressure is within the normal operating range.
Parts Desk Insights
SKU 47-78761 is a Sierra marine oil filter under the Sierra brand, long-style configuration for GM/Chevrolet marine engines. Compare against the short-style Sierra filter (47-78242) — the long style is preferred where clearance allows, as the additional filter media can extend service intervals. GM-block engines appear across MerCruiser, OMC, and some Volvo Penta applications; verify the specific platform and engine code.
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.