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Choke Diaphragm: Prelude

  1. Disconnect vacuum hoses from choke opener diaphragms. Connect vacuum pump to inner diaphragm fitting. Apply vacuum. Vacuum should hold at 4-8 in. Hg and opener rod should pull in.
  2. Plug outer diaphragm fitting and apply vacuum to inner fitting. Choke opener rod should pull in. If diaphragm does not react as described, replace left carburetor.
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