799584 Carburetor Compatible with craftsman m220 model 12A-A26B793 Lawn Mower Carb

What It Is

This is an aftermarket carburetor for the Craftsman M220 push mower (model 12A-A26B793), designed to replace a clogged or failed OEM carburetor. It meters the correct fuel-air mixture for the Briggs & Stratton engine on this specific mower, restoring starting and running performance.

Fitment & Compatibility

• Exact model match: Only for Craftsman M220 with model number 12A-A26B793. Check the sticker under the mower deck or on the handle.
• Engine type: Fits the Briggs & Stratton 450E/500E series engines found on this mower (typically 140cc or 158cc).
• OEM equivalent: Replaces OEM part number 799584 (also listed as 593477, 591809 on some Briggs variants).
• Measurement check: Ensure the mounting flange bolt spacing is 2.75 inches center-to-center and the fuel inlet nipple is 1/4 inch. Measure your old carburetor to confirm.
• Deck size: Does not depend on deck width (21-inch standard), but the carburetor is specific to this engine platform.

Key Things to Know

• Quality: Aftermarket, not OEM. Most users report it works fine, but a few note the gaskets are thinner than OEM—consider buying a separate gasket set.
• Installation difficulty: Moderate. You’ll need a socket set, screwdrivers, and possibly a carburetor cleaning spray. Plan 30–45 minutes.
• Common gotcha: The plastic fuel line can be brittle—heat it gently with a hairdryer to soften before reconnecting. Also, the primer bulb on the M220 is separate; this carburetor does not include it.
• Adjustment: No adjustable mixture screws. If it runs poorly after install, check for air leaks at the gaskets or a blocked fuel line.

Should You Buy It

Buy this if your Craftsman M220 won’t start or runs rough due to a gummed or failed carburetor, and you want an affordable fix before considering a new mower. It’s a solid value for the price and rating, but if you prefer exact OEM fit and thicker gaskets, spend more on a genuine Briggs & Stratton carburetor.