Sierra 18-7284 862077A 1 Merc Fuel Pump

Keep your Mercury outboard running smoothly on the water with a reliable fuel delivery system. This high-performance fuel pump steps in as a direct replacement for worn-out components, ensuring consistent fuel flow to your engine's carburetors or injectors. Boat owners swear by its durability, especially during long days of fishing or cruising where every second counts.

Why Your Outboard Needs a Sturdy Fuel Pump

A faltering fuel pump can turn a perfect outing into a nightmare—erratic idling, hesitation under load, or outright stalling. This pump tackles those issues head-on by delivering precise pressure and volume, mimicking the original equipment's performance. Crafted with precision engineering, it handles the rigors of marine environments, from salty coastal waters to freshwater lakes.

Perfect Fit for Popular Mercury Models

Engineered to match OEM specifications, it slots right into a range of 4-stroke Mercury and Mariner outboards. Think 75HP to 125HP powerheads from the early 2000s onward—common in popular models like the 90ELPT and 115 Optimax series. Always cross-check your engine's serial number for the best match, as variations exist across years and horsepower ratings.

• Direct bolt-on design—no modifications required
• Compatible with both inline and remote setups
• Supports ethanol-blended fuels without breakdown

Standout Features That Outperform

What sets this apart? Robust diaphragm construction resists cracking, while high-quality check valves prevent backflow for instant starts. It's built to pump at the exact PSI your engine craves, avoiding lean conditions that lead to overheating or seizures. Plus, its compact profile fits tight engine compartments without hassle.

Effortless Installation Tips

Swap it out in under an hour with basic tools. Start by relieving fuel pressure—clamp the line or remove the pulse hose. Disconnect fittings, unbolt the old unit, and reverse for the new one. Pro tip: Inspect the fuel lines and filter while you're in there; replace if they're brittle. Prime the pump by cycling the key before firing up to avoid dry runs.

1. Disconnect battery for safety
2. Drain residual fuel
3. Torque bolts to spec (usually 10-15 ft-lbs)
4. Test for leaks at idle and WOT

Maintenance to Maximize Lifespan

Extend its life with simple habits: Run the engine regularly to circulate fuel and prevent varnish buildup. Add a stabilizer for off-season storage, and swap the fuel filter annually. Watch for symptoms like hard starting or black smoke, which signal it's time for inspection rather than a full failure.

Real-World Reliability from Fellow Boaters

Captains report seamless performance after thousands of hours. One offshore angler noted it revived his 115HP Merc that sputtered on plane—now it's back to punching through chop like new. Sierra's reputation shines here: affordable quality without skimping on materials that matter in harsh saltwater conditions.

Upgrade Your Engine's Heart Today

Don't let fuel woes sideline your adventures. This pump restores power, reliability, and peace of mind, so you focus on the horizon—not the engine bay.