Nissan 100NX N14 silhouetteN14

Carburetor - Fuel Level / Automatic Choke

EF & EC-164prose procedure

Applies to GA13DS, GA14DS & GA16DS carbureted engines.

Fuel Level

INSPECTION

Place vehicle on a level surface. With engine idling, check fuel level.

ADJUSTMENT

Fuel Level Adjustment

  1. 1
    Remove carburetor from engine.
  2. 2
    Remove choke chamber from carburetor.
  3. 3
    Turn choke chamber upside down, and fix it horizontally.
  4. 4
    Raise float fully, then lower it slowly until float seat contacts needle valve, and in this position, check height "H1". If out of specification, adjust by bending float seat. Make sure needle valve slides smoothly on float seat.
    Height "H1": 9.5 - 10.5 mm (0.374 - 0.413 in)
    Float adjustment diagram. Top shows needle valve, float seat and height 'H1' with a BENDING arrow. Bottom shows two float-seat conditions labeled O.K. and N.G. with float seat callouts.
    SEF537G
  5. 5
    Lower float slowly until float stopper contacts carburetor, and in this position, check height "H2". If out of specification, adjust by bending float stopper.
    Height "H2": 43.0 - 44.0 mm (1.693 - 1.732 in)
    Float stopper height 'H2' measurement illustration showing the float lowered until the float stopper contacts the carburetor.
    SEF674G
  6. 6
    Install choke chamber and then place carburetor on engine.
  7. 7
    Perform "FUEL LEVEL INSPECTION".
Height "H1"0.374 - 0.413 in
9.5 - 10.5mm
Height "H2"1.693 - 1.732 in
43.0 - 44.0mm

Automatic Choke

MECHANICAL CHECK

Automatic Choke Mechanical Check

  1. 1
    Before starting engine, fully open throttle valve and ensure that choke valve closes properly.
  2. 2
    Push choke valve with your finger to check for smooth movement.
    Automatic choke circuit schematic showing choke valve, bimetal spring, heater, automatic choke, automatic choke relay, and alternator 'L' terminal.
    SEF110C
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See also

FUEL LEVEL INSPECTION

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