EZAPEX Fuel Pump Replacement for Briggs & Stratton 540000–543000 Series — OE 844527/844089, 1/4" Vacuum Inlet, Corrosion-Resistant

The EZAPEX upgraded fuel pump (OE 844527 / 844089) is a direct-fit replacement for Briggs & Stratton 540000–543000 series engines, delivering reliable fuel delivery with 1/4" vacuum inlet/outlet and durable corrosion-resistant construction.

If your lawn mower or small engine is running rough, stalling, or not getting consistent fuel flow, a worn or leaking pump can be the culprit. This EZAPEX unit is engineered to match the original equipment fit and function for Briggs & Stratton 540000, 541000, 542000, and 543000 series engines. It’s built from high-precision materials, supplied with a complete installation kit, and designed for straightforward replacement so you can get back to mowing quickly.

How will this pump improve my engine's performance?

Replacing a failing fuel pump restores steady fuel pressure and prevents air leaks that cause rough idling, sputtering, or stalls. The pump's corrosion-resistant internals and tight tolerances help maintain consistent flow across operating conditions.

• Direct-fit design mirrors original OE dimensions for reliable sealing.
• Vacuum-operated 1/4" inlet and outlet for standard hose connections.
• Durable materials reduce wear and extend service life.

Is this pump compatible with my Briggs & Stratton engine?

This EZAPEX unit is specified to replace OE numbers 844527 and 844089 and is compatible with Briggs & Stratton 540000, 541000, 542000, and 543000 series engines. It is not rated for fuels containing more than 10% ethanol.

• Fits 540000–543000 series Briggs & Stratton engines.
• Replaces OE part numbers 844527 and 844089.
• Avoid use with fuels above 10% ethanol content.

How difficult is installation and what’s included?

The pump is designed as a direct replacement so most hobbyists and mechanics can install it quickly. EZAPEX ships a complete installation kit with the pump, making the swap straightforward with basic tools.

• Complete installation kit provided (gaskets, clamps, or fittings as required).
• Standard 1/4" hose connections require no special adapters in typical setups.
• Simple bolt-on replacement—follow OEM routing and torque specs.

What should I expect for durability and support?

The pump uses precision-manufactured components that resist corrosion and wear to extend service intervals compared with lower-quality aftermarket parts. EZAPEX also offers customer support to address any fitment or performance questions after purchase.

• High-precision materials for improved longevity.
• Quality control checks to ensure consistent operation out of the box.
• Responsive after-sales support from EZAPEX for troubleshooting.

Who is this for? The EZAPEX upgraded fuel pump is intended for homeowners, landscapers, and small-engine technicians who need a dependable, direct-replacement fuel pump for Briggs & Stratton 540000–543000 series lawn mowers and equipment. It’s ideal if you want an OE-equivalent part (844527 / 844089) that’s easy to install, avoids ethanol-heavy fuels, and offers improved resistance to wear and corrosion.