Fuel Injector – Fits Mercury 25HP & 30HP EFI (Replaces 898101T74, 8M0091784)

Fuel Injector – Fits Mercury 25HP & 30HP EFI (Replaces 898101T74, 8M0091784)

This electronic fuel injector is designed for Mercury 25HP & 30HP EFI 4-Stroke outboards (2006–present) with serial numbers 0R106966 and up. It is a direct replacement for Mercury part numbers 898101T74 and its supersession 8M0091784, ensuring precise fit and function.

As a high-impedance component controlled by the ECM, this injector is engineered for installation in multi-port EFI systems, delivering fuel efficiently to the intake manifold for optimal engine performance.

• Application: Fits 3-cylinder inline Mercury 25/30HP EFI engines (2006+).
• Fuel Type Compatibility: Gasoline.
• Installation Method: Mounts to the intake manifold within a multi-port EFI system.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

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.

Technical Specifications

Package Contents

• 1 x Fuel Injector (Part No. 8M0091784)

Installation Guide

1. Safety First: Before starting, disconnect the negative battery terminal and ensure the engine is cool. Relieve the fuel system pressure according to your engine’s service manual to prevent fuel spray.
2. Access the Injector: Remove any covers or components obstructing access to the fuel rail and injectors.
3. Disconnect: Unplug the electrical connector from the fuel injector you intend to replace.
4. Remove Fuel Rail: Loosen and remove the mounting bolts that secure the fuel rail to the intake manifold.
5. Extract Injector: Gently lift the fuel rail assembly. Carefully pull the old fuel injector straight out from its port on the fuel rail. You may need to gently twist it to break the seal.
6. Prepare New Injector: Lightly lubricate the new injector's O-rings with clean engine oil. This prevents tearing and ensures a proper seal.
7. Install New Injector: Press the new fuel injector firmly and squarely into the fuel rail port until it seats completely.
8. Reinstall Fuel Rail: Reposition the fuel rail assembly, aligning each injector with its port in the intake manifold. Re-install and tighten the mounting bolts to the manufacturer's specified torque.
9. Reconnect: Securely plug the electrical connector back onto the new injector.
10. Check for Leaks: Reconnect the battery. Turn the ignition key to the “ON” position (do not start the engine) for a few seconds to pressurize the system. Carefully inspect the injector and fuel rail for any signs of fuel leaks.
11. Final Test: If no leaks are found, start the engine and check for smooth operation.

Troubleshooting & FAQ

Q: How can I be sure this fuel injector fits my exact Mercury engine?

A: The most reliable method is to check your engine's serial number. This injector fits Mercury 25HP and 30HP EFI models starting with serial number 0R106966 (or 0R165086 for Jet models). You can find this number on a plate on the transom bracket. Compare this to the ranges listed in our "Compatible Engine Models" table.

Q: What are common symptoms of a bad fuel injector?

A: Common signs include difficulty starting, a rough or unstable idle, engine misfires (which may trigger a check engine light), reduced power and acceleration, and worsening fuel economy. A malfunctioning injector can cause the engine to run too lean or too rich.

Q: Do I need any special tools for installation?

A: Basic hand tools like a socket/ratchet set are typically sufficient. A fuel line disconnect tool may be helpful for certain models. Most importantly, have a clean workspace and refer to your engine's service manual for specific procedures and torque specifications.

Q: OEM vs. 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.