WYJ-400-1 Walbro Engine - Overview

Genuine Walbro replacement part, this item is sold individually. By pressing the bulb, it will purge the carburetor of air. Fuel will be forced up from the fuel tank through the fuel line then into the carburetor. Then the excess fuel will be forced back into the fuel tank through the fuel return line. At some time the primer will lose ...Read moreits elasticity or crack and need to be replaced. We have an article and video on How to Replace a Primer Bulb, in our Repair Center. That can be found on the front page of our site.

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 Walboro replacement part that is OEM sourced to ensure high quality. The check valve is intended to be used with carburetors for small engines. This item fits into the center of the air purge body. This item is used to allow the purge bulb to force air through the check valve causing fuel be drawn from the tank to the fuel pump and through the carburetor. This part is priced as a single item.

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.