AQXMIOE Carburetor Kit for Briggs & Stratton 300E/450E/500E 125–140cc — Direct Fit, New Gaskets

AQXMIOE 799583 carburetor kit is a direct-fit replacement assembly designed to restore proper fuel delivery for Briggs & Stratton 300E/450E/500E/550EX and related 125cc–140cc lawnmower engines.

If your mower shows rough idling, hard starts, fuel leaks, or black exhaust smoke, a worn or damaged carburetor is often the cause. This AQXMIOE kit replaces OEM part numbers such as 593261, 799583, 595656, 591979 and 591160 and is built to match the fit and function of popular Briggs & Stratton small-engine models, including 08P502 and 09P602 series. The kit uses durable materials intended to resist deformation and extend service life while addressing common carburetor problems.

Will this carburetor kit fit my Briggs & Stratton engine?

Yes—this kit is made for a wide range of Briggs & Stratton small engines. Check your engine model and part numbers before purchase to confirm compatibility.

• Compatible engine families: 300E, 450E, 500E, 550EX and 125cc–140cc series.
• Works with OEM codes: 08P502 and 09P602 series parts listed in the compatibility table.
• Replaces original part numbers: 593261, 799583, 799579, 595656, 591979, 591160.
• Verify your engine stamp or carburetor casting number to ensure a full match.

How does this kit address common engine problems?

The kit includes components designed to stop leaks and restore correct fuel flow, which improves starting, idling stability, and combustion. It’s intended to be a practical repair option before replacing the whole engine or carburetor assembly.

• New seals and gaskets reduce fuel seepage and oil contamination risks.
• Precision-molded body resists warping for consistent fuel metering.
• Restored float and needle seating helps eliminate flooding and hard starts.
• Replaces worn jets and passages to reduce black smoke and poor throttle response.

What should I know before installing the replacement carburetor?

Installation is straightforward for anyone comfortable with basic small-engine maintenance, but it requires attention to orientation and clean connections. Keep tools, a clean workspace, and the engine manual handy.

• Disconnect spark plug for safety and drain fuel to prevent spills.
• Match mounting holes, throttle linkages, and choke connections to originals.
• Replace gaskets with those in the kit; tighten bolts evenly to spec.
• After install, run the engine and fine-tune idle/mixture screws as needed.

What warranty and customer support does AQXMIOE provide?

AQXMIOE backs this carburetor kit with after-sale support to help resolve fit or performance issues. They offer a straightforward return/refund path if the part is defective or incompatible.

• 1-year after-sale service for defects or failures under normal use.
• Customer support available for troubleshooting installation or fitment questions.
• Clear refund and return policy if the kit fails or is damaged in transit.

Who is this for? The AQXMIOE 799583 carburetor kit is aimed at lawn mower owners, small-engine mechanics, and maintenance professionals who need an affordable, compatible replacement for specific Briggs & Stratton 125cc–140cc engines. Choose this kit if you want to repair fuel leaks, fix rough idle or hard starting, and restore dependable performance without buying a full OEM carburetor assembly. Always verify engine model and part numbers before ordering to ensure a correct match.