Walbro WA Carburetor Repair And Service
Walbro WA Carburetor Manual and Parts List for the correct identification, repair and service of the WA series carburetor, commonly found on chainsaws. View free online images or download the full PDF which can be printed or saved on any suitable device using a PDF reader. Clear diagrams and information to help in parts ordering or repair of this Walbro WA series carburetor. Identify all component parts of the Walbro carburetor.
The Walbro model number is stamped on the body of the carburetor
With both needles set at 1 and 1/4 turns open, proceed as follows:
1 Start engine and adjust idle throttle screw so that engine idles at a moderate speed slightly slower than clutch engagement.
2 Turn low-speed needle clockwise (lean) until engine runs smoothly.
3 Re-adjust idle screw to correct engine speed.
4 Continue turning low-speed screw slowly clockwise until a slight decrease is noted in engine speed. Stop.
5 Turn low-speed needle counter-clockwise for optimum smooth engine
IDLE SPEED FIXED No adjustment required, needle eliminated
HIGH SPEED ADJUSTMENT
With high-speed needle 1 and 1 /4 turns open the machine should run
rich at wide open throttle. Listen for the four-cycling sound.
2 With throttle wide open and no load on the chain, turn high-speed
needle clockwise until engine becomes smooth (two-cycling).
3 Optimum adjustment is achieved when a very slight four-cycling sound is heard.
HIGH SPEED FIXED No adjustment required, needle eliminated
NOTE: Circuit Plates for high altitudes are available Refer to owner’s manual.
Walbro WA Carburetor Manual and Parts List Diagrams
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