Keep your Yamaha outboard running smoothly on the water with the Sierra 18-7345 electric fuel pump. Designed as a direct replacement for OEM part 7345, this pump delivers reliable fuel flow to prevent hesitation, stalling, or hard starts—common headaches for boaters facing aging fuel systems.

Superior Engineering for Demanding Marine Conditions

Crafted with a positive displacement gerotor design, the Sierra 18-7345 ensures consistent fuel pressure regardless of engine angle or wave action. The carbon commutator minimizes electrical noise (RFI) and lowers amp draw, protecting your boat's electrical system and extending battery life during long outings.

• Meets or exceeds OEM specs: Tested for fit, form, and function to match factory performance.
• Gerotor technology: Self-priming and tolerant of ethanol-blended fuels, reducing wear from modern gas formulations.
• Compact and durable: Corrosion-resistant housing withstands saltwater exposure and vibration.

Boost Reliability and Performance on Your Yamaha Outboard

Boat owners often overlook fuel pumps until symptoms like rough idling or power loss hit mid-trip. This Sierra pump tackles those issues head-on by maintaining optimal pressure for crisp throttle response and efficient combustion. It's especially valuable for high-hour engines where OEM pumps degrade from varnish buildup or diaphragm fatigue.

Users report easier priming after storage and fewer no-start scenarios in cooler weather, thanks to the pump's efficient motor design. Pair it with routine fuel filter changes for peak longevity—expect years of trouble-free service with basic maintenance.

Effortless Compatibility Across Yamaha Models

This versatile pump fits a range of Yamaha outboards from 40HP to 300HP, covering popular V6 and inline-four configurations. Confirm your model by checking the OEM part number or consulting your service manual—it's a plug-and-play swap in most cases, reusing existing fuel lines and electrical connectors.

Simple Installation Tips from Seasoned Mechanics

Swapping in the Sierra 18-7345 takes under an hour with basic tools. Disconnect the battery first, relieve fuel pressure by pinching the line or running the engine dry, then unclip the old pump. Mount the new one securely, reconnect hoses with fresh clamps, and cycle the key to prime before firing up.

1. Drain residual fuel to avoid spills.
2. Inspect O-rings and gaskets—replace if cracked.
3. Test for leaks at idle and under load.
4. Secure wiring away from hot exhaust parts.

Pro tip: Add inline fuel stabilizer during install to combat ethanol separation in stored boats.

Why Boaters Trust Sierra Over Other Aftermarket Options

Sierra stands out for its no-compromise approach to marine-grade parts. Unlike budget pumps that falter under heat or ethanol, this one uses premium materials for real-world durability. Backed by rigorous testing, it's the choice for DIYers and pros alike who demand OEM-level performance without the markup.