WT-644-1 Walbro Engine - Parts

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 a genuine item that is supplied by the original equipment manufacturer for use with Walbro carburetors. It is an identical replacement for missing or a faulty plug-welch that was installed on a new unit, please make sure to refer the appropriate diagrams of your model for the correct location and application of this hardware. Keep...Read more in mind this high-quality part is made of durable material and is sold individually.

This is an authentic Walbro replacement part that has been sourced from the original manufacturer to be used with carburetors from small engines. Overtime ethynol additives in gasoline can form deposits that can clog the fuel passages inside the carburetor. This can affect the engine's performance. Signs of a clogged carburetor are issues...Read more with the engine idling, or problems starting the engine. When the carburetor is clogged it can be cleaned out and rebuilt. The kit includes all the parts that are recommended to replace when rebuilding the carburetor. The repair parts are sold in a complete kit.

This is an OEM part sourced directly from the manufacturer. The spring is commonly found in Walbro carburetors. This part is made of metal, and is used to provide tension to the needle. Please be aware that there are different needles used in the machine. Refer to the parts diagram to be sure of ordering the correct part. This part is sold individually.