startzeal 799583 Carburetor Fits for Lawnmower engine 300E 450E 500E 550EX 500 125cc 140cc 08P502 8P502 09P602 9P602, for 593261 595656 591979 591160 ZAGOPIK

What It Is

This is an aftermarket carburetor replacement for small single-cylinder lawnmower engines, primarily from Briggs & Stratton’s 300E, 450E, 500E, and 550EX series, plus compatible 125cc and 140cc engines. It’s designed for standard walk-behind mowers needing a direct bolt-on fuel system swap.

Fitment & Compatibility

Before buying, confirm your engine’s model number (e.g., 08P502, 09P602) and the OEM carburetor part number (e.g., 593261, 595656, 591979, 591160). This carburetor fits Briggs & Stratton engines with a side-mount, one-bolt float bowl design. Measure the mounting flange bolt spacing (approx. 2.5 inches center-to-center) and the fuel inlet diameter (likely 5/16-inch barb). It will not fit vertical-shaft engines with different bowl or linkage layouts. Check that your throttle/governor linkage matches—this carburetor uses a standard fixed-jet system, not adjustable.

Key Things to Know

• Quality vs OEM: At $13.98, it’s a fraction of OEM cost. Users report it works well out of the box, but occasional jet or gasket imperfections may require cleaning or swapping your old gasket.
• Installation Difficulty: Easy (30-60 minutes). You’ll need a socket set, screwdriver, and possibly a carburetor cleaning spray. No tuning needed—it’s preset.
• Common Gotchas: The supplied gaskets may not seal perfectly; reuse your original if possible. Also, check the float height (should be level when inverted) and ensure the fuel shut-off valve is clean.
• Return Policy: Since it’s aftermarket, verify the seller’s return window—some may not accept carburetors if installed.

Should You Buy It

If your mower’s engine model matches the list and you want a quick, low-cost fix to get it running again, this is a solid choice. It’s best for DIYers comfortable with basic carburetor work and who don’t need OEM-specific adjustability. Skip it if you require a perfect OEM match or have an older, non-standard engine.