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805227A1 Fuel Pressure Regulator Assembly for Mercury Mercruiser | JLM Marine
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Fuel Pressure Regulator Assembly for Mercury Mercruiser 7.4L 8.2L 502MAG 454 EFI Stern Drive Engines
This Fuel Pressure Regulator Assembly is engineered for MerCruiser stern drive engines including 7.4L/LX MPI, 454 & 502 Mag MPI, and 8.2L MPI models. It ensures precise fuel pressure regulation for optimal engine performance and reliability in Electronic Fuel Injection (EFI) systems.
This assembly directly replaces Mercury Mercruiser OEM part number 805227A1, providing a reliable aftermarket solution for your stern drive maintenance needs.
- Complete regulator assembly ready for installation
- Designed for EFI fuel system applications
- Ensures proper fuel pressure for smooth engine operation
Part Number Cross-Reference
Use this table to confirm equivalent part numbers across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| Mercury Mercruiser | 805227A1 |
Compatible Engine Models
Confirm your engine model/year in the table below. For Mercury owners, here's a guide to help you identify your engine's serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.
| Brand | Model |
|---|---|
| MerCruiser | MCM/MIE 7.4L/LX MPI |
| MerCruiser | 454 Mag MPI |
| MerCruiser | 502 Mag MPI |
| MerCruiser | 8.2L MPI |
Technical Specifications
| Specification | Value |
|---|---|
| OEM Part Number | 805227A1 |
| Application | MerCruiser Stern Drive Engines (EFI) |
| Component Type | Fuel Pressure Regulator Assembly |
Package Contents
This package contains the following component:
- 1 × Fuel Pressure Regulator Assembly
Installation Guide
- Disconnect the battery to prevent electrical hazards during installation.
- Relieve fuel system pressure by following your engine manufacturer's procedure to prevent fuel spray.
- Locate the existing fuel pressure regulator on your MerCruiser stern drive engine.
- Disconnect fuel lines from the regulator carefully, using a rag to catch any residual fuel.
- Remove mounting hardware securing the old regulator to the engine.
- Remove the old regulator assembly and set aside.
- Position the new regulator assembly in place, ensuring proper alignment with mounting points.
- Secure with mounting hardware, tightening bolts to manufacturer specifications.
- Reconnect fuel lines to the new regulator, ensuring all connections are secure and properly seated.
- Check all fittings and connections for tightness to prevent fuel leaks.
- Reconnect the battery and turn the ignition to prime the fuel system (do not start yet).
- Inspect for leaks, then start the engine and verify proper fuel pressure and smooth operation.
Troubleshooting & FAQ
Q: How do I confirm this fuel pressure regulator fits my MerCruiser engine?
A: Verify your engine model against the compatibility table above (7.4L/LX MPI, 454/502 Mag MPI, or 8.2L MPI). Cross-reference your existing part number with 805227A1, or consult your engine's parts diagram using the links provided.
Q: What are the signs that my fuel pressure regulator needs replacement?
A: Common symptoms include rough idle, poor acceleration, fuel leaks near the regulator, black smoke from exhaust, or difficulty starting. If you notice fuel pressure irregularities or engine performance issues, inspect the regulator.
Q: Can I install this regulator myself or do I need a professional?
A: If you have mechanical experience and can safely relieve fuel system pressure, you may install it yourself. However, due to the fire hazard of working with fuel systems, professional installation is recommended for safety and warranty purposes.
Q: How often should I replace the fuel pressure regulator?
A: Fuel pressure regulators typically last many years under normal conditions. Replace when you notice performance issues, fuel leaks, or during major fuel system overhauls as preventive maintenance.
Q: Is this an OEM part or aftermarket?
A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.
Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.
Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.
Important Notes
- Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
- This product is an aftermarket replacement part and is not an OEM component.
- Professional installation is recommended to ensure safety and optimal performance.
Why Choose JLM MARINE?
- Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
- Fast Global Shipping: Free delivery worldwide in 5–15 days.
- Direct from Manufacturer: Competitive pricing without compromising quality.
We can ship to virtually any address in the world with free shipping available for most regions.
For our typical US and Canadian customers , our shipping timeframes are as follows:
- Amazon FBA: orders will be delivered within 1-5 business days after placing the order (during certain special periods such as major promotions, Christmas, etc., the delivery time of Amazon FBA may be affected).
- US warehouse shipment: orders will be delivered within 5 days after placing the order.
- China warehouse shipment: orders will be delivered about 12 days after placing the order.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
Founded in 2002, JLM Marine has established itself as a dedicated manufacturer of high-quality marine parts, based in China. Our commitment to excellence in manufacturing has earned us the trust of top marine brands globally.
As a direct supplier, we bypass intermediaries, which allows us to offer competitive prices without compromising on quality. This approach not only supports cost-efficiency but also ensures that our customers receive the best value directly from the source.
We are excited to expand our reach through retail channels, bringing our expertise and commitment to quality directly to boat owners and enthusiasts worldwide.
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