Sierra 18-7517

Enhance Your Outboard Engine Performance with the Sierra 18-7517 Fuel Filter

Keeping your marine engine running smoothly starts with clean fuel delivery. The Sierra 18-7517 fuel filter acts as a critical barrier against contaminants like dirt, rust particles, and water that can clog injectors or damage fuel pumps in outboard motors. Designed for boaters who demand reliability on the water, this filter ensures consistent fuel flow, preventing hesitation during acceleration or unexpected stalls far from shore.

Unlike basic filters that merely catch debris, the Sierra 18-7517 features advanced filtration media that traps even microscopic impurities while allowing optimal flow rates. Boaters report noticeable improvements in throttle response and fuel efficiency after installation, making it a smart upgrade for weekend warriors and serious anglers alike.

Perfect Fit for Popular Outboard Engines

This versatile filter integrates seamlessly with a range of Mercury and Mariner outboard models, serving as a direct replacement for OEM part 35-822626Q7. It's compatible with engines from 40HP to 125HP, including popular V6 configurations commonly found on bass boats, center consoles, and pontoons.

• Ideal for 4-stroke outboards where fuel system integrity is paramount.
• Threaded connections match factory specs for hassle-free swaps.
• Compact design fits tight engine compartments without modifications.

Whether you're maintaining a family cruiser or prepping for a fishing tournament, this filter keeps your powerplant primed for peak performance.

Key Features and Build Quality

Sierra engineers crafted the 18-7517 with marine-grade materials to withstand harsh saltwater environments and vibration from high-RPM operation. Highlights include:

• High-efficiency pleated paper element for superior dirt-holding capacity.
• Corrosion-resistant metal end caps and housing.
• Clear bowl option on compatible setups for easy visual inspection of captured water or debris.
• Meets or exceeds OEM specifications for pressure drop and flow rates.

Its robust construction translates to longer service intervals, reducing downtime and maintenance costs over the boating season.

Simple Installation and Maintenance Tips

Swapping out your old filter takes under 30 minutes with basic tools. Start by relieving fuel system pressure, then unscrew the old unit counterclockwise. Clean the mounting bracket, apply thread sealant to the new filter's gasket, and hand-tighten plus a quarter-turn with a filter wrench. Prime the system by cycling the key before firing up the engine.

For longevity:

1. Inspect annually or every 100 hours of operation.
2. Replace if you notice milky fuel (water contamination) or reduced engine power.
3. Pair with a quality fuel stabilizer for off-season storage.
4. Monitor for leaks post-install and torque fittings properly.

These steps not only extend filter life but also safeguard your entire fuel injection system against costly repairs.

Why Boaters Trust Sierra Engine Parts

Sierra has built a reputation for affordable, no-compromise aftermarket parts that match OEM performance without the premium price tag. The 18-7517 exemplifies this with rigorous testing for burst pressure, flow restriction, and filtration efficiency. Anglers and mechanics alike praise its durability in real-world conditions, from choppy bays to calm lakes. Investing in this filter means fewer headaches and more time enjoying the water.