Zama A007157 Check Valve Nozzle Assembly Carburetor

The Zama A007157 is a genuine OEM check valve nozzle assembly designed for Zama diaphragm carburetors. This critical carburetor component, also known as the main nozzle check valve, ensures proper fuel delivery and prevents air from entering the metering chamber during engine operation.

Key Features:

• Genuine Zama OEM replacement part for reliable performance
• Press-in style check valve nozzle assembly
• Prevents air from entering the idle circuit and metering chamber
• Essential for proper primer bulb operation on equipped models
• Helps maintain stable idle and smooth acceleration
• Compatible with various Zama carburetor models including C1Q, C1S, and C1U series

Function and Benefits:

The check valve nozzle assembly is located at the bottom of the carburetor metering chamber and serves as the main fuel jet. It allows fuel to flow in one direction while preventing air from being drawn back through the nozzle during idle and low-speed operation. A faulty check valve can cause hard starting, inconsistent idle, inability to prime, air bubbles in the primer bulb, and failure to accelerate properly. Replacing a worn or defective check valve nozzle assembly restores proper carburetor function and engine performance.

This component is commonly used in carburetors found on chainsaws, string trimmers, blowers, and other small engine equipment from manufacturers like Stihl, Echo, Husqvarna, and others equipped with Zama carburetors.