Fuel Pressure Regulator – Fits MerCruiser 305 350 377 454 EFI (Replaces 807952A1)
Fuel Pressure Regulator – Fits MerCruiser 305 350 377 454 EFI (Replaces 807952A1) 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 Pressure Regulator – Fits MerCruiser 305 350 377 454 EFI (Repl...
Fuel Pressure Regulator – Fits MerCruiser 305 350 377 454 EFI (Replaces 807952A1) is backordered and will ship as soon as it is back in stock.
Product Details
This Fuel Pressure Regulator – Fits MerCruiser 305 350 377 454 EFI is designed for MCM/MIE GM V-6 and V-8 engines, including 305, 350, 377, and 454 EFI models. It is compatible with MCM 575SCi systems and mounts directly on the fuel cooler, ensuring reliable fuel pressure management across a range of MerCruiser EFI applications.
This aftermarket regulator serves as a direct replacement for OEM part number 807952A1.
- Mounts on fuel cooler (pink mark)
- Designed for MerCruiser EFI fuel systems
- Verify engine serial number if unsure of compatibility
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| MerCruiser | 807952A1 | OEM reference |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | Notes |
|---|---|---|
| MerCruiser | MCM/MIE GM V-6, V-8 305, 350, 377 EFI | 4.3, 5.0, 5.7, 6.2, 7.4 liter variants |
| MerCruiser | MCM 575SCi | 454 EFI |
Technical Specs
- Application
- MerCruiser EFI fuel systems
- Mounting Location
- Fuel cooler (pink mark)
- Compatible Displacements
- 4.3L, 5.0L, 5.7L, 6.2L, 7.4L
- Engine Type
- GM V-6, V-8
What's in the Box
- Fuel Pressure Regulator
Installation Notes
- Relieve fuel system pressure before beginning work. Disconnect battery negative terminal.
- Locate the fuel cooler; the regulator mounts on the side indicated by the pink mark.
- Remove the old regulator by disconnecting fuel lines and unbolting the unit.
- Clean mounting surface and inspect fuel lines for wear or damage.
- Install the new regulator using original hardware or provided fasteners, ensuring proper orientation.
- Reconnect fuel lines and secure all clamps to manufacturer torque specifications.
- Reconnect battery and turn ignition to prime fuel system; check for leaks before starting engine.
- Start engine and verify stable fuel pressure and smooth operation.
Troubleshooting & FAQ
How do I verify this fits my MerCruiser engine?
Check your engine model against the compatibility table above. If your engine is a GM V-6 or V-8 305, 350, 377, or 454 EFI, this regulator should fit. Cross-reference your existing part number with 807952A1. If unsure, provide your engine serial number to Sea Sierra support.
Where exactly does this regulator mount?
It mounts directly on the fuel cooler. Look for the pink mark on the cooler to identify the correct mounting point.
What are common signs of a failing fuel pressure regulator?
Symptoms include rough idle, poor acceleration, black smoke from exhaust, fuel leaks, or difficulty starting. You may also notice fuel pressure fluctuations or a strong fuel odor.
Can I reuse the original mounting hardware?
Yes, if the original bolts and clamps are in good condition and not corroded. Inspect threads and replace any damaged fasteners.
How often should the fuel pressure regulator be replaced?
Replace when you observe performance issues or fuel leaks. Regular inspection during maintenance intervals is recommended, especially on high-hour or older engines.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications against your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
Payment & Security
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