Fuel Injector – Fits Mercury MerCruiser 496 Mag & 8.1L Engines (Replaces 881693002)
Fuel Injector – Fits Mercury MerCruiser 496 Mag & 8.1L Engines (Replaces 881693002) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
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Fuel Injector – Fits Mercury MerCruiser 496 Mag & 8.1L Engines ...
Fuel Injector – Fits Mercury MerCruiser 496 Mag & 8.1L Engines (Replaces 881693002) is backordered and will ship as soon as it is back in stock.
Product Details
This replacement Fuel Injector – Fits Mercury MerCruiser 496 Mag & 8.1L Engines (Replaces 881693002). It is designed for Mercury MerCruiser 8.1L and 496 cid V8 engines (2004 and later) equipped with Multi-Port Injection (MPI), ensuring precise fuel delivery and reliable performance.
This part is a direct interchange for Mercury part numbers 881693002 and 8M0221353, Crusader RA087006, Delphi 25348180, 25176061, 17116061, and General Motors 3861278.
- Plug-and-play direct replacement for easy installation.
- Features a modern 3-hole disc spray pattern for superior fuel atomization.
- Constructed with a durable metal housing and Viton O-rings for longevity in marine environments.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Superseded By |
|---|---|---|
| Mercury | 881693002 | 8M0221353 |
| Crusader | RA087006 | |
| Delphi | 25348180 / 25176061 / 17116061 | |
| General Motors | 3861278 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
Fits various Mercury MerCruiser 496 and 8.1L models manufactured from 2004 onward. Always verify your engine's OEM part number.
This injector may also be compatible with certain Volvo Penta and Crusader 8.1L engines. Cross-reference your original part number to ensure correct fitment.
| Brand | Model | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Mercury MerCruiser | 496 Mag | 4-Stroke | 2004 and later | 881693002 | Superseded by 8M0221353 |
| Mercury MerCruiser | 496 H.O. | 4-Stroke | 2004 and later | 881693002 | Superseded by 8M0221353 |
| Mercury MerCruiser | 8.1S | 4-Stroke | 2004 and later | 881693002 | Superseded by 8M0221353 |
| Mercury MerCruiser | 8.1 H.O. | 4-Stroke | 2004 and later | 881693002 | Superseded by 8M0221353 |
| Mercury MerCruiser | 8.1L Inboard (V-Drive) | 4-Stroke | 881693002 | Superseded by 8M0221353 | |
| Mercury MerCruiser | 8.1L Inboard (Inline) | 4-Stroke | 881693002 | Superseded by 8M0221353 | |
| Volvo Penta | 8.1L | 4-Stroke | 881693002 | ||
| Crusader | 8.1L | 4-Stroke | RA087006 |
Technical Specs
- Product Type
- Fuel Injector
- Installation
- Direct replacement, plug-and-play
- Fuel Type
- Gasoline
- Connection
- Multec II / Delphi electrical connector
- Housing Material
- Metal
- Housing Color
- Black/Silver
- Dimensions
- 58 mm (2-5/16") overall length, 48 mm (1-7/8") o-ring to o-ring, 17 mm body diameter
- Fitting Type
- 3-hole disc spray pattern
- O-Ring Size
- Viton 14.5 mm diameter (upper/lower)
- Electrical Resistance
- 12.5 Ohms
What’s in the Box
- 1 x Fuel Injector (Replaces 881693002/8M0221353)
Installation Notes
- Disconnect the negative battery terminal and safely relieve the fuel system pressure.
- Disconnect the electrical connector from the fuel injector.
- Carefully remove the fuel rail retaining bolts and lift the fuel rail assembly.
- Remove the retaining clip and pull the old injector from the fuel rail.
- Compare the new injector with the old one to confirm an exact match.
- Lightly lubricate the new O-rings with clean engine oil.
- Install the new injector into the fuel rail, ensuring it is fully seated. Secure with the retaining clip.
- Reinstall the fuel rail, tighten the bolts to the manufacturer's torque specification, and reconnect the electrical connector.
- Reconnect the battery. Turn the ignition key to the "On" position (do not start) a few times to pressurize the system.
- Inspect for any fuel leaks around the injectors and fuel rail.
- Start the engine and check for smooth operation.
Troubleshooting & FAQ
How do I know if my fuel injectors are failing?
Common symptoms of a bad fuel injector include rough idling, engine misfires (often with a check engine light), poor acceleration, reduced fuel economy, and the smell of raw fuel.
Is this a direct fit for my 2006 MerCruiser 496 H.O.?
Yes, this fuel injector is a confirmed fit for MerCruiser 496 H.O. and 8.1L H.O. engines made in 2004 and later. Always double-check your existing part number to be sure.
What is the difference between this injector and the original OEM part?
This part is functionally identical to the original, using the same connector, fitment dimensions, and flow rate specifications. The primary difference is it is an aftermarket component, not an original Mercury part, offering comparable performance at a better value.
Do I need to replace all injectors at once?
While not mandatory, it is highly recommended to replace fuel injectors as a complete set. This ensures balanced fuel delivery, consistent engine performance, and prevents issues from other aging injectors failing soon after.
Is any computer or ECU tuning required after installation?
No. This is a stock replacement injector designed to match the original factory flow rates. No tuning or programming is necessary.
OEM vs. Aftermarket?
This is an aftermarket replacement part, not an OEM component. It has been manufactured in an ISO 9002 certified facility to meet or exceed OEM specifications using comparable materials and is batch-inspected for quality and consistency.
What are the shipping speed & cost?
We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free to most regions, with expedited options available at checkout where applicable.
What is the warranty and return policy?
This part is covered by a 1-year warranty against manufacturing defects under normal marine use. If an issue arises, contact our support team with your order details. Returns are accepted within our standard window for unused parts in their original condition. Please see our policy page or contact us for instructions.
Safety & Important Info
- Verify images and specifications against your original part before purchasing. If anything differs—even if your model is listed as compatible—do not purchase.
- This is an aftermarket replacement component, not a genuine OEM part.
- Professional installation is strongly recommended for safety and optimal performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and rigorously tested for real-world reliability.
- Fast Global Fulfillment — We offer free standard delivery to most regions, with typical transit times of 5–15 days.
- Manufacturer-Direct Value — By working directly with manufacturers, we provide fair pricing without compromising on materials or quality control.
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