WT-640-1 Walbro Engine - Overview

This genuine OEM check valve seat assembly ensures proper fuel flow in one direction preventing leaks and backflow. It is located near the fuel inlet needle inside the carburetor between the needle control diaphragm chamber and the mixture screws cavity. If damaged it can lead to fuel leakage flooding and engine issues like sputtering or ...Read moredifficulty starting. Neglecting to replace a broken assembly can result in costly repairs and breakdowns. To replace the check valve seat assembly refer to your user guide for instructions to access and disassemble the carburetor. This may involve removing covers air filters fuel lines or other components. Since the slot for the assembly is shallow you can enlarge its opening by using a drill press. You can pry the valve out with an awl. Alternatively you can use a drift punch and mallet. Place the drift punch on top of the check valve seat and gently tap it to loosen and remove it. Please keep in mind that this replacement part is sold individually.

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.

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 choke friction spring is sourced from the original equipment manufacturer for use in carburetors. It is a small, coiled metal spring that helps to maintain the desired position of the choke by providing the right amount of tension. If the spring wears down, breaks, or is dislodged from its position, you will notice difficulties start...Read moreing the engine, rough idling, and lower power output. To remove the spring, use a pair of needle nose pliers to detach it from the choke lever/plate. Install the new friction choke spring, and ensure it is adequately tensioned to keep the choke in place. Move the choke lever to confirm that the plate opens and closes freely, before reassembling your equipment.