WYP-4-1 Walbro Engine - Overview

This authentic OEM metering diaphragm assembly is housed within the carburetor of your lawn and garden equipment. Positioned between the carburetor body and the fuel pump, it regulates fuel delivery and maintains the air-fuel ratio within the engine. It has a self-adjusting vacuum system and responds to the amount of fuel being drawn into...Read more the engine. When the engine runs at higher speeds, more fuel is pulled in and the diaphragm compresses. As a result, the pin in the center of the diaphragm pushes against the metering level and lifts the regulator inlet needle, letting additional fuel flow from the pump into the reservoir. If the assembly malfunctions, you may experience engine stalling, rough idling, or notice fuel odor, pooling, or dripping around the carburetor area. To remove the metering diaphragm, refer to your user guide for instructions on locating and accessing the carburetor. This typically involves removing the fuel pump cover screw and pump cover, followed by the fuel pump diaphragm and gasket. Remember to blow through the external pulse hole on the body casting and remove the filter screen before proceeding to remove the four screws securing the metering diaphragm plate and the metering diaphragm itself. Please note that this replacement part is sold individually.

This is an original Walbro replacement part. The metering lever pin is designed by the manufacturer for use in carburetors. This part is made of metal, and is used to secure the metering lever and allow it to pivot as needed. You may require a screwdriver and pliers or a punch set when replacing this item. This part is sold individually.

This is a genuine OEM sourced component which is specially made for use with Walbro carburetors commonly installed on lawn and garden equipment. Its purpose is to ensure that the fuel that goes through the unit is free of dust and other harmful contaminants. Unfortunately, over time it will wear out and may get clogged eventually requirin...Read moreg a replacement. Keep in mind this high-quality fuel inlet screen is made of durable material and is sold individually. Make sure to refer to the appropriate diagrams of your model for the correct location and application of this part.

This is a genuine Walbro replacement part manufactured for use with carburetors. This gasket is used to seal the diaphragm and carburetor body. It is recommended to replace the gasket when servicing the carburetor to ensure a good seal when the carburetor is reassembled. The gasket is sold individually, please see model diagram for associative parts.