WYJ-133-1 Walbro Engine - Overview

It is a genuine replacement component which is supplied directly from the original equipment manufacturer for use with Walbro carburetors. This special gasket provides an air-tight seal for the pump, please make sure to check appropriate diagrams of your unit for the correct location and use of this item. Over time gaskets tend to deterio...Read morerate and may crack eventually requiring replacement to ensure peak performance. It is a high-quality part which is made of composite material and it is sold individually.

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 item is a genuine Walbro replacement part that has been sourced from the original manufacturer to be used with small engine carburetors. The kit is used when cleaning and rebuilding the carburetor. This kit includes all the items that are recommended to replace when servicing the carburetor. The repair kits are sold individually.