594492 Carburetor Compatible with Briggs & Stratton 500cc 17.5hp Replacement 27761152 Carb with Air Filter

What It Is

This is an aftermarket carburetor assembly designed for Briggs & Stratton 500cc engines (typically 17.5 hp), commonly found on riding lawn mowers and tractors. It replaces OEM part numbers 594492 and 27761152 and includes an air filter, making it a direct swap for engines that are hard-starting, surging, or running rich/lean due to a worn or clogged carb.

Fitment & Compatibility

Before buying, verify your engine’s model number (stamped on the valve cover or blower housing). This carb fits Briggs & Stratton single-cylinder engines with 500cc displacement (approx. 17.5 hp) and uses a fixed-jet, non-adjustable design. It will not work on engines with a different displacement or older models with adjustable main jets. Measure your existing carb’s mounting bolt spacing (typically 2.5 inches center-to-center) and ensure the intake flange shape matches. Also confirm your mower’s deck size is irrelevant—fitment depends solely on engine model, not deck width. Check that your throttle/choke linkage style matches (this carb uses a standard 2-cable setup). If you have a plastic intake elbow or metal spacer, reuse it for proper sealing.

Key Things to Know

• Quality variance: As an aftermarket part, it may have slightly thinner gaskets or less precise machining than OEM. Inspect for casting burrs and clean fuel ports before installation.
• Installation difficulty: Moderate DIY job (30–60 minutes). You’ll need a socket set, screwdrivers, and possibly a new fuel line. No special tools required, but carburetor cleaner is recommended.
• Common gotcha: The included air filter may be low-quality—consider using your existing OEM filter if it’s clean. Also, the carb may need a minor float level adjustment if it floods or starves.
• Tuning: No adjustable mixture screws; performance is fixed. If your engine still runs poorly after install, check for dirty fuel or a clogged fuel pump.

Should You Buy It

Buy this if your Briggs 500cc engine is hard-starting or surging due to a carb issue, and you want a low-cost, fast fix without OEM markup. It’s a good value for DIYers who can handle basic carb swaps, but skip it if you need exact OEM fitment or have an older engine with adjustable jets—stick with the genuine Briggs part for those.