Mercury – Quicksilver Fuel Injector | For 135–150HP DFI OptiMax Outboards | 804527

Overview

When your outboard starts running rough or losing power, it could be time for a new injector. The Mercury Marine 804527 Quicksilver Fuel Injector is designed specifically for Mercury 135–150HP DFI OptiMax 2-Stroke outboards, ensuring clean, consistent fuel delivery to every cylinder. It’s a precision-built, factory-tested component that keeps your engine running strong, smooth, and efficient — just like it did on day one.

Key Features

• Purpose: Delivers precise fuel metering for strong performance and cleaner combustion.
• Construction: Built to Mercury’s factory specs for exact flow rate and pressure.
• Performance: Restores smooth acceleration, steady idle, and efficient fuel use.
• Durability: Materials are marine-tested for corrosion resistance and long service life.
• Ready to Install: Pre-fitted with O-rings for easy replacement and a perfect seal.

Engine & Boat Compatibility

• Mercury 135HP, 140HP, and 150HP DFI OptiMax 2-Stroke outboards

Performance & Real-World Benefits

The 804527 fuel injector plays a key role in keeping your engine firing perfectly. Over time, injectors can clog or wear, leading to poor throttle response, misfires, or uneven fuel burn. This genuine Mercury part restores the precise fuel delivery your engine was built for, improving both power and fuel economy.

Each injector is factory-calibrated for accuracy and balance, ensuring consistent performance across all cylinders. Whether you’re cruising or running full throttle, this injector helps your engine start easier, run cleaner, and respond instantly.

Why Choose Mercury OEM

The Quicksilver 804527 is a true Mercury Marine component, made to the same standards as the injectors installed at the factory. Cheaper alternatives might fit, but they rarely match Mercury’s precision or reliability.

Mercury OEM injectors are built from corrosion-resistant materials and tested under marine load conditions to deliver exact fuel flow and long-term dependability. It’s the same injector trusted by Mercury technicians — and the best way to keep your OptiMax performing like new.

FAQ

Q1: What engines does this injector fit?
It fits Mercury 135–150HP DFI OptiMax 2-Stroke outboards.

Q2: Why replace fuel injectors?
Old or dirty injectors can cause poor fuel atomization, leading to rough idle, power loss, or poor fuel economy.

Q3: Are O-rings included?
Yes — the injector comes pre-assembled with O-rings for easy installation.

Q4: Is this a genuine Mercury part?
Yes — it’s an OEM factory injector, designed for exact performance and fit.

Q5: Why OEM instead of aftermarket?
Mercury’s injectors are precision-calibrated, salt-tested, and balanced, ensuring reliable fuel delivery and maximum engine life.