Sierra Marine Fuel Pump 18-7268 – MerCruiser / Volvo Penta Mechanical Fuel Pump GM V6 V8
Free returns on all eligible orders
You have 30 days to request a return. All sale items are final sale.
The Sierra 18-7268 Fuel Pump is a mechanical, engine-mounted fuel pump designed for GM-based marine inboard and sterndrive engines. This pump delivers consistent fuel flow from the tank to the carburetor, ensuring reliable engine performance across all operating conditions.
Featuring a marine-safe design with vent tube provision, this pump helps prevent fuel leakage into the bilge in the event of diaphragm failure—making it compliant with marine safety standards.
Built to meet or exceed OEM specifications, this pump is a direct replacement for MerCruiser, Volvo Penta, and OMC applications using GM V6 and V8 platforms.
Key Features
- Mechanical diaphragm-style fuel pump
- Marine-safe design with vent/overflow tube provision
- Engine-mounted (camshaft-driven)
- Provides consistent fuel delivery for carbureted engines
- Direct OEM replacement fit and performance
- Corrosion-resistant marine-grade construction
- Sierra limited lifetime warranty
Engine Compatibility
MerCruiser (GM-Based Engines)
- 4.3L V6
- 5.0L V8
- 5.7L V8
- 6.2L V8
Volvo Penta
- 4.3L V6
- 5.0L V8
- 5.7L V8
OMC / Cobra / Inboard
- GM-based V6 and V8 engines
➡️ Fits carbureted engines only (not for EFI or fuel-injected systems)
Serial Number Fitment Notice
Fitment depends on fuel system type and mounting configuration.
⚠️ Always confirm:
- Carbureted vs fuel-injected engine
- Mounting style and fuel line routing
- Presence of vent tube system
Using engine serial number verification is strongly recommended.
When This Part Needs Replacement
Replace the fuel pump if you notice:
- Engine cranks but won’t start
- Fuel starvation under load
- Engine stalling or hesitation
- Fuel leaks or fuel smell in bilge
- Oil contamination from diaphragm failure
Installation Notes
- Ensure proper routing of vent/overflow tube (critical for safety)
- Replace mounting gasket during installation
- Inspect fuel lines and filters
- Verify correct pushrod engagement during install
- Prime fuel system before startup
Alternate / Superseded Part Numbers
OEM Cross References
- Mercury / MerCruiser:
- 861155A3
- 861155A4
- Volvo Penta:
- 3858261
- OMC:
- 0985445
Aftermarket Cross References
- Mallory: 9-35403
- Carter: M6626
- Airtex: M6626
Shipping
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.