Testing...Testing
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Open the primary throttle linkage. This will allow the secondaries to open under vacuum. Use an air nozzle to blow air over the small vacuum hole located in step (1). You may have to move the nozzle around a bit until you find the sweet spot. The secondaries should open when the air flows past the vacuum port. If the secondary blades don’t open, there is a problem. Your secondary passage may be blocked or the diaphragm may be damaged. View Related Article
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