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Description
142-1457 – Toro Check Valve Diaphragm (2PX) Replacement (OEM-Spec)
The Toro 142-1457 Check Valve Diaphragm (2PX) is a genuine Toro replacement component engineered to meet OEM standards for precision, sealing performance, and durability. This diaphragm is a key part of Toro fuel and air management systems (commonly found in primer bulbs and carburetor check valve assemblies), helping regulate one-way flow of fuel or air to ensure proper engine starting and operation. Manufactured to Toro’s exact specifications, the 142-1457 diaphragm provides reliable sealing and consistent performance on compatible Toro outdoor power equipment.
Product Details
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Manufacturer Part Number: 142-1457
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Brand: Toro
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Part Type: Diaphragm, Check Valve
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System: Fuel/air control in carburetor or primer assembly (2PX designation)
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Material: Precision-molded flexible diaphragm material
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OEM Status: Genuine Toro replacement
Function
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Provides one-way fluid or air flow control in fuel/air systems
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Helps maintain proper pressure for engine starting and idle
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Prevents backflow that can disrupt carburetor or primer operation
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Supports smooth engine performance and reliable throttle response
Compatible With
The Toro 142-1457 Check Valve Diaphragm (2PX) is used on select Toro walk-behind mowers, trimmers, blowers, and outdoor power equipment where this diaphragm is specified, including models equipped with engine systems that utilize a 2PX check valve diaphragm.
Exact compatibility depends on the specific Toro model and equipment serial number. Always verify the diaphragm’s application and part number with your parts diagram before ordering.
How It’s Used
This check valve diaphragm installs within the fuel or air control system—typically inside a primer bulb assembly or carburetor check valve module—where it regulates one-way flow. Typical replacement steps include:
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Turn off the engine and disconnect the spark plug for safety.
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Access the carburetor/primer or check valve assembly requiring the diaphragm.
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Remove the old diaphragm and any associated gaskets or components.
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Install the Toro 142-1457 diaphragm in the correct orientation.
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Reassemble the assembly, ensuring all seals and gaskets are properly seated.
Proper installation ensures proper fuel/air regulation and reliable engine start/idle performance.
Suggested Maintenance
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Inspect the diaphragm periodically for cracks or loss of flexibility
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Replace if fuel leaks, hard starting, or improper idle occur
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Ensure surrounding gaskets and seals are in good condition
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Keep the carburetor and fuel system clean to prevent diaphragm wear
The Toro 142-1457 Check Valve Diaphragm (2PX) is a dependable OEM-spec replacement designed to maintain proper one-way flow and sealing—ideal for ensuring reliable fuel and air regulation in compatible Toro outdoor power equipment.


