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Carburetor - HITACHI 2-Bbl: Overhaul: Reassembly

  1. Install new gasket to main body. Attach both ends of throttle lever return spring. See Fig 1 . Install throttle body to carburetor main body. Hook throttle valve end of return spring over boss on bottom of main body.
  2. Install throttle body retaining screws with correct style lock washer. See Fig 2 . Tighten mounting screws to 36-60 INCH Lbs. (4-7 N.m). Install primary and secondary main jets. Install float bowl drain plug gaskets and drain plugs. Install drain plug lock plate.
  3. Install float level gauge seal and level gauge. Install gauge with mark to the inside. Install micro switch assemblies and springs. Check micro switch adjustment. Install jets, air bleeds and plug in original position in carburetor main body. See Fig 3 .
  4. Install check balls, weights and injector spring. Install accelerator pump piston return spring with "U" shaped end down. Install needle valve filter, seat, gasket, needle valve and float to air horn. Adjust float level as necessary. Install primary and secondary slow air bleeds in air horn.
  5. Apply silicone grease to mixture control solenoid valve seal. Install new air horn gasket. Install air horn to main body. Install accelerator pump lever. Check accelerator pump lever for smooth operation.
Fig 1: Installing Throttle Lever Return Spring
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Fig 2: Positioning Throttle Body Lock Washers Install lock washers as shown.
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Fig 3: Installing Jets, Air Bleeds & Plug
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Fig 4: Exploded View of Hitachi DFB 306 Carburetor Assembly
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