100% New Fuel Injector for Mercury MerCruiser MPI 8.1L V8 and Volvo Penta 8.1L/496 CID Engines
100% New Fuel Injector for Mercury MerCruiser MPI 8.1L V8 and Volvo Penta 8.1L/496 CID Engines is backordered and will ship as soon as it is back in stock.
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Worry-free returns
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Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
U.S. orders usually arrive within 6–15 days, depending on stock location and destination.
International delivery times may vary due to customs processing.
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100% New Fuel Injector for Mercury MerCruiser MPI 8.1L V8 and Volvo...
100% New Fuel Injector for Mercury MerCruiser MPI 8.1L V8 and Volvo Penta 8.1L/496 CID Engines is backordered and will ship as soon as it is back in stock.
Product Details
This 100% new aftermarket fuel injector is designed for Mercury MerCruiser MPI 8.1L V8 applications, including 496 Mag and 496 Mag HO engines, as well as Volvo Penta marine 8.1L and 496 CID engines. It is sold as one individual injector and is intended to replace the original injector when the applicable part number and engine configuration match.
The Sierra catalog identifies reference number 18-7698 as a fuel injector that replaces Mercury part number 881693002 and fits MCM 496 Mag and HO engines and MIE 8.1S and HO applications. The company catalog also lists Mercury references 8M0221353 and 881693, Volvo Penta reference 3861278, and Crusader reference RA087006 for this product family.
- 100% new aftermarket fuel injector; not a used or remanufactured component.
- Sold individually for replacement of one injector.
- Suitable for specified Mercury MerCruiser and Volvo Penta 8.1L/496 CID marine applications when the original reference and connector match.
- Verify the original injector and engine details before ordering.
Part Number Matrix
The following references are provided for identification and cross-reference purposes. A number appearing in this table does not replace the need to verify the engine application, connector, and original injector.
| Brand or Source | Reference Number | Relationship |
|---|---|---|
| Mercury MerCruiser | 881693002 | Replacement reference |
| Mercury MerCruiser | 8M0221353 | Company-listed reference |
| Mercury MerCruiser | 881693 | Company-listed reference |
| Volvo Penta | 3861278 | Company-listed reference |
| Sierra Marine | 18-7698 | Aftermarket cross-reference |
| Crusader Marine | RA087006 | Company-listed cross-reference |
| Mallory Marine | 9-33103 | Company-listed cross-reference |
Engine & Model Compatibility
Use the following application information as a guide, then confirm the part number on your original injector. Model, engine configuration, year, and serial-number conditions must match the application for a correct fit.
| Brand | Engine or Application | Fuel System | Displacement | Reference | Fitment Note |
|---|---|---|---|---|---|
| Mercury MerCruiser | 496 Mag | MPI | 8.1L V8 / 496 CID | 881693002 | Application listed for the fuel injector reference |
| Mercury MerCruiser | 496 Mag HO | MPI | 8.1L V8 / 496 CID | 881693002 | Application listed for the fuel injector reference |
| Mercury MerCruiser | 8.1S | MPI | 8.1L V8 / 496 CID | 881693002 | Application listed for the fuel injector reference |
| Mercury MerCruiser | 8.1L HO | MPI | 8.1L V8 / 496 CID | 881693002 | Application listed for the fuel injector reference |
| Volvo Penta | Marine 8.1L / 496 CID | MPI | 8.1L V8 / 496 CID | 3861278 | Company-listed fitment; verify the original part number |
| Crusader Marine | 8.1L marine applications | MPI | 8.1L V8 | RA087006 | Cross-reference only; confirm the application before purchase |
Do not rely on engine displacement alone. Compare the original injector, electrical connector, mounting arrangement, and applicable manufacturer reference before installation.
Technical Specs
- Product Type
- Fuel injector
- Condition
- 100% new aftermarket component
- Quantity
- One injector
- Application
- Marine gasoline MPI fuel systems for specified 8.1L V8 / 496 CID engines
- Primary Reference
- Mercury MerCruiser 881693002
- Additional Company-Listed References
- 8M0221353, 881693, Volvo Penta 3861278, Crusader RA087006
- Aftermarket Cross-References
- Sierra 18-7698; Mallory 9-33103
What’s in the Box
- 1 x 100% new fuel injector
Installation Notes
- Disconnect the battery and follow the engine manufacturer's procedure for safely relieving fuel-system pressure.
- Confirm that the replacement injector matches the original injector, connector, mounting arrangement, and applicable reference number.
- Disconnect the electrical connector from the injector.
- Remove the fuel rail or injector retaining hardware according to the engine service procedure.
- Remove the old injector carefully and protect the fuel rail and sealing surfaces from dirt or damage.
- Install the replacement injector using clean, properly lubricated seals where required by the manufacturer's procedure.
- Secure the injector and reinstall the fuel rail and retaining hardware using the manufacturer's specified torque.
- Reconnect the electrical connector and battery.
- Prime the fuel system as specified by the engine manufacturer, then inspect the injector and fuel rail for leaks before operating the engine.
- Start the engine only after confirming that there are no fuel leaks, and check for proper operation.
Fuel-system work can create a fire hazard. Use appropriate ventilation, keep ignition sources away, and have installation performed by a qualified marine technician when necessary.
Troubleshooting & FAQ
Is this injector sold as a set?
No. This product is sold as one individual 100% new fuel injector. If replacing multiple injectors, order the required quantity separately.
Which engines is this injector intended for?
The company-listed application is Mercury MerCruiser MPI 8.1L V8. Related listed applications include Mercury 496 Mag and 496 Mag HO, Mercury 8.1S and 8.1L HO, and Volvo Penta marine 8.1L/496 CID engines. Confirm the original reference and engine configuration before ordering.
Does it replace Mercury reference 881693002?
Yes. The company catalog lists 881693002 as a replacement reference, and the Sierra catalog identifies 18-7698 as a fuel injector that replaces 881693002 for the specified 496 Mag, 496 Mag HO, 8.1S, and HO applications.
Is this a genuine Mercury or Volvo Penta part?
No. This is a 100% new aftermarket replacement injector. Mercury, Volvo Penta, Sierra, and other names and numbers are used only to identify compatible reference applications.
Do I need to replace all injectors at once?
Not necessarily. Replace the failed injector or the quantity recommended by your marine technician, and follow the engine manufacturer's service guidance. Matching the correct injector across the engine is important for consistent fuel delivery.
Is programming or ECU tuning required?
A stock replacement injector normally does not require programming, but the correct application and injector specification must be confirmed before installation. Follow the engine manufacturer's service instructions.
How do I confirm compatibility?
Compare your original injector's manufacturer reference, engine model, fuel-injection system, connector, and mounting arrangement with the information on this page. When the details do not match, contact a qualified marine technician before purchasing.
What are the shipping speed and cost?
Shipping availability, delivery time, and cost are calculated at checkout based on destination and service selected.
What is the warranty and return policy?
Warranty and return eligibility are governed by the current store policies. Review the applicable policy before installation, because installed or used fuel-system components may have different return requirements.
Safety & Important Information
- Verify the original injector reference and complete engine application before purchase.
- Do not rely on displacement or model name alone; year, fuel system, connector, and serial-number conditions may affect fitment.
- This is an aftermarket replacement component, not a genuine OEM component.
- Relieve fuel pressure before service and inspect carefully for leaks after installation.
- Professional installation is recommended for fuel-system work.
About Sea Sierra
- Marine Replacement Parts — We supply replacement components for a range of marine engine and sterndrive applications.
- Application-Focused Listings — Product references and fitment information are provided to help you compare the replacement with your original part.
- Support Before Installation — If your engine details or original part number differ from the information shown, verify compatibility before ordering or installing.
Payment & Security
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