Carburetor for GX240 (8.0 HP) / GX270 (9 HP) — Replacement for part 16100-ZH9-W21 Key benefits Restores smooth engine operation by improving the fuel–air mixture, reducing stalling and hesitation. Designed to work with engines fitted with air filter tuning kits, allowing tuned intake systems to run reliably. Direct replacement for original part 16100-ZH9-W21 for quick, trouble-free installation and fit. What it does The carburetor meters and mixes a precise proportion of gasoline with intake air. Under the vacuum produced by the running engine, fuel is drawn in, mixed with the incoming air and atomized so the engine can burn it efficiently. As a mechanical device, it provides consistent fuel–air ratios across normal operating conditions to maintain power and efficiency. Compatibility and specifications Compatible with Honda GX240 (8.0 HP) and GX270 (9 HP) engines. Replacement for OEM part number 16100-ZH9-W21. Intended for use on motors equipped with air filter tuning kits. Performance and fit Engineered to match the original carburetor’s function and mounting points so it integrates with existing fuel lines and air intake hardware. Improves throttle response and steadiness of idle when properly matched and adjusted to the engine and intake setup. Practical use scenarios Repair or service of a petrol hedge trimmer powered by a GX240 or GX270 engine where the original carburetor is worn or damaged. Upgrading or tuning an engine equipped with an aftermarket air filter tuning kit that requires a carburetor compatible with modified intake airflow. Routine maintenance and replacement on small engine equipment (engines using GX240/GX270) to restore factory-like fuel delivery and performance. Notes for buyers Confirm engine model (GX240 or GX270) and part number 16100-ZH9-W21 before purchase to ensure compatibility. Final tuning (mixture and idle adjustments) may be required after installation, especially when used with aftermarket intake or filter modifications. This product is a mechanical carburetor intended to replace the original unit and replicate its fuel–air mixing function.