Walbro wya manual

Please note that carburetors and engine applications will vary therefore the needle settings may vary also. Adjust the idle speed screw to the correct idle RPM. Check idle, progression and wide-open throttle.

When the WYK carburetor is at the wide open throttle position, the throttle lever will be at the highest side of the ramp. This will allow the idle needle to be pulled away from the nozzle outlet and allow enough fuel to be fed to the engine at W. The barrel will be fully open allowing as much air as permitted to enter from the choke side and flow into the engine. Some WYK carburetors have a high-speed needle to adjust the fuel flow delivered to the nozzle.

High-speed needle adjustment should be done after the idle needle setting procedure is complete. Your email address will not be published. Skip to navigation Skip to content. Hidden label. Contact Us. Purchase Product. If you know the specific carburetor or carburetor components you need, just follow these easy steps:. Email: aftermarket tiauto.

New: Walbro video featuring hands-on demonstrations of key service procedures including inspection, proper disassembly, testing, and reassembly of butterfly and rotary carburetors. This all-new, 21 minute video demonstrates the proper techniques for servicing Walbro butterfly valve and rotary valve diaphragm carburetors.

The video will be of value to dealers, service technicians and technically-oriented consumers. View free online images or download the full pdf with diagrams and clear information. Clear diagrams and information to help in parts ordering or repair of this Walbro WYA series carburetor. Identify all component parts of the Walbro carburetor. With the WYA at the wide-open throttle w. This will allow the idle needle to pull away from the nozzle outlet and allow enough fuel to flow into the engine at w.

With the throttle valve fully open, the max. The upper throttle bore allows air to flow into the combustion chamber via the stratified scavenging port. The inner idle needle is preset to meet the engine and federal emission regulation requirements. The needle is and should always be covered to limit its access and adjustment.