NIKKI 2-Barrel - MAZDA B2000: Overhaul: Disassembly
- Remove carburetor and cover intake manifold port with clean shop towel to prevent dust and dirt from entering. Disconnect accelerator pump rod from lever and remove lever from main body.
- Remove throttle return spring. Disconnect choke diaphragm-to-main body vacuum hose at main body. Spread clips and remove solenoid valve and choke heater leads. Remove choke rod retaining clip and remove choke rod. Remove air horn retaining screws. Separate air horn from main body and discard gasket.
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- Remove choke cover retaining screws and remove choke cover. Mark position of choke thermostat cover index mark on choke housing and remove thermostat cover. Remove fuel inlet fitting from main body. Remove fuel inlet fitting, filter and packing. Remove accelerator pump piston assembly from main body.
- Remove inlet check ball retainer clip. Invert carburetor and remove strainer and inlet check ball. Remove pump check valve retainer. Invert carburetor and remove check valve. Remove main body attaching bolts (1 bolt on bottom of throttle body). Separate throttle body from main body.
- Remove fuel inlet bolt and washers from main body. Remove needle valve, spring and valve stem. Remove fuel bowl sight glass cover screws, cover, gasket, glass and rubber gasket. Remove float pin and float. Remove diaphragm cover retaining screws, diaphragm cover and spring.
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- Remove screw and bolt attaching secondary arm to main body, then remove throttle lever assembly. Remove clip securing diaphragm rod to secondary throttle shaft. Remove secondary throttle shaft retaining screw and throttle lever. Remove diaphragm body. Using power valve remover (490118870A), remove power valve.
- Remove primary jet plugs, gaskets and main jets. Remove idle jets and all air bleeds from main body. See Fig 2. Using a hacksaw, cut through mixture limiter shell 0.47" (12 mm) from shell end. Remove and discard mixture screw, spring and shell.