Mercury – Fuel Injectors | Precision Fuel Delivery Series | Engineered Marine Components | 8M0142264

Overview

There is a certain confidence that comes from turning the key and hearing your engine light off instantly, the idle settling into a clean, steady rhythm. You can feel when a motor is breathing the way it should—smooth, responsive, ready to push the boat wherever you point the bow. Mercury Fuel Injectors 8M0142264 are built for that feeling. Whether you are cruising long channels at sunrise or trimming up and letting the hull run free across open water, these injectors help your engine deliver consistent power you can trust day after day.

Key Features

• Precision-engineered fuel injector with two pre-installed O-rings
• Spray pattern optimized for clean combustion and maximum performance
• Designed to support fast starts, smooth idling, and strong throttle response
• Built to deliver reliable fuel atomization under demanding marine loads
• Tested in harsh marine conditions for durability and longevity

Engine & Boat Compatibility

• Fits 175–225hp Mercury 3.4L V6 FourStroke outboards (2B529482 & up)
• Fits 200–300hp Mercury 4.6L V8 FourStroke outboards (2B529482 & up)
• Fits 350–425hp Mercury 5.7L V10 FourStroke outboards (3B266064 & up)
• Compatible with Mercury Racing 150R–500R V6, V8, and V10 engines
• Ideal for center consoles, bay boats, pontoons, runabouts, offshore rigs, and performance hulls

Performance & Practical Benefits

A well-tuned engine is a pleasure to run. These injectors help maintain that easy, confident feel by delivering fuel with tight, predictable accuracy. The spray pattern is engineered to burn cleanly, which keeps throttle response crisp whether you are easing into a no-wake zone or opening up for a quick run across the lake.

Their steady, consistent flow helps keep the engine smooth at idle and strong at higher RPM—something you notice most when the water turns choppy or you are carrying a full load of passengers. The injectors fit securely, with the O-rings providing a tight, leak-free seal that feels rock solid once installed. You will appreciate the difference in how the engine settles, responds, and holds power under load.

They are also built for real-world durability. Long hours on the water mean exposure to heat, vibration, and fuel quality that is not always perfect. These injectors are tested to handle that environment without drifting out of spec, helping you stay on the water instead of troubleshooting at the dock.

Why Buy OEM

With something as critical as fuel delivery, you want components that match your engine exactly. These are genuine Mercury Marine parts, built to the same tolerances and performance expectations as the injectors installed at the factory. Aftermarket options may look similar, but slight differences in spray pattern or flow rate can affect everything from fuel economy to throttle feel.

OEM injectors give you consistent, long-term performance and save you from guesswork. They drop into place without modification, maintain the engine’s intended performance curve, and help protect your investment by ensuring your outboard runs the way Mercury designed it to.

FAQ

Q1: Which Mercury engines does the 8M0142264 Fuel Injector fit?

It fits Mercury 3.4L V6, 4.6L V8, and 5.7L V10 FourStroke outboards, plus Mercury Racing V6, V8, and V10 models.

Q2: What makes this injector different from aftermarket versions?

It is built to Mercury’s OEM specifications, ensuring the correct spray pattern, flow rate, and long-term reliability.

Q3: How can I confirm this is the right injector for my outboard?

Match your engine’s serial number and displacement with the compatibility list, or check your owner’s manual.

Q4: Can these be used in saltwater and freshwater?

Yes. They are engineered for durability in all marine environments.

Q5: Is installation straightforward?

Most owners with basic mechanical experience can install them using common tools, though many prefer dealer installation for peace of mind.