Zama A015074 Metering Diaphragm Assembly for Small Engine Carburetors

The Zama A015074 is a genuine OEM metering diaphragm assembly designed for use in Zama small engine carburetors. This carburetor diaphragm assembly is a critical internal component that regulates fuel delivery into the metering chamber, ensuring consistent engine performance across all throttle positions.

The metering diaphragm responds to pressure changes within the carburetor: as engine vacuum drops fuel levels in the metering chamber, the flexible diaphragm deflects against the metering lever, overriding the inlet needle spring to allow fresh fuel to flow in. A worn, cracked, or stiffened diaphragm will prevent this action, leading to lean-running conditions, hard starting, or engine stall. Replacing this assembly restores proper fuel metering function without requiring a full carburetor rebuild.

Key Features:

• Genuine Zama OEM replacement part — ensures exact fit and material specifications
• Manufactured from flexible, fuel-resistant material designed for reliable diaphragm movement
• Restores proper fuel metering and inlet needle actuation
• Direct replacement for failed or degraded metering diaphragm assemblies in compatible Zama carburetors
• Helps resolve symptoms such as rough idle, lean surge, hard starting, and engine stall

This is a factory Zama part intended for use by small engine technicians and experienced do-it-yourself mechanics performing carburetor service on outdoor power equipment including chainsaws, string trimmers, leaf blowers, and other 2-cycle powered tools.